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#1
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To Sand or not To Sand - before applying anti-foul paint?
We are about to take a 4-year old Bavaria 38 Ocean to a boat yard to get a
new application of anti-fouling paint on the bottom. The boat's previous owner advised us that "the antifouling paint used is Petit Ultima SR, applied over a blue signal (base) coat. Apply 3 to 5 coats of red anti-foul paint, depending on the location (5 coats on leading edge of keel, stem, rudder, high wear areas ) and that just pressure wash until the blue signal coat appears. No surface prep is required other than the pressure wash - let the water dry off, and just roll on the new coat(s). Sanding is verboten.The paint is a soft, copolymer ablative which retains 100% effectiveness all the way through as it wears away" The boat yard says that it is nexccessary to sand the bottom lightly before applying the anti-fouling paint...and that they will not guarantee the work if the bottom is not sanded. The previous owner has always been reliable in his advise and I do not feel comfortable going against his recommendation that NO sanding is permitted. Comments??? CVJ |
#2
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We've never found sanding to be necessary. Our boats have always been
in San Diego, and we power wash, sand out chips, flakes or cracks, prime bare spots, and cover with 2 coats of paint to hull, 3 coates at the waterline and all leading edges. This is good for about 3 years on average, with monthly cleanings. In warmer water...I can't say. Keith cvj wrote: We are about to take a 4-year old Bavaria 38 Ocean to a boat yard to get a new application of anti-fouling paint on the bottom. The boat's previous owner advised us that "the antifouling paint used is Petit Ultima SR, applied over a blue signal (base) coat. Apply 3 to 5 coats of red anti-foul paint, depending on the location (5 coats on leading edge of keel, stem, rudder, high wear areas ) and that just pressure wash until the blue signal coat appears. No surface prep is required other than the pressure wash - let the water dry off, and just roll on the new coat(s). Sanding is verboten.The paint is a soft, copolymer ablative which retains 100% effectiveness all the way through as it wears away" The boat yard says that it is nexccessary to sand the bottom lightly before applying the anti-fouling paint...and that they will not guarantee the work if the bottom is not sanded. The previous owner has always been reliable in his advise and I do not feel comfortable going against his recommendation that NO sanding is permitted. Comments??? CVJ |
#3
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It would seem that a call to the manufacturer or their rep would provide the
answer. -- "Keith Hughes" wrote in message news We've never found sanding to be necessary. Our boats have always been in San Diego, and we power wash, sand out chips, flakes or cracks, prime bare spots, and cover with 2 coats of paint to hull, 3 coates at the waterline and all leading edges. This is good for about 3 years on average, with monthly cleanings. In warmer water...I can't say. Keith cvj wrote: We are about to take a 4-year old Bavaria 38 Ocean to a boat yard to get a new application of anti-fouling paint on the bottom. The boat's previous owner advised us that "the antifouling paint used is Petit Ultima SR, applied over a blue signal (base) coat. Apply 3 to 5 coats of red anti-foul paint, depending on the location (5 coats on leading edge of keel, stem, rudder, high wear areas ) and that just pressure wash until the blue signal coat appears. No surface prep is required other than the pressure wash - let the water dry off, and just roll on the new coat(s). Sanding is verboten.The paint is a soft, copolymer ablative which retains 100% effectiveness all the way through as it wears away" The boat yard says that it is nexccessary to sand the bottom lightly before applying the anti-fouling paint...and that they will not guarantee the work if the bottom is not sanded. The previous owner has always been reliable in his advise and I do not feel comfortable going against his recommendation that NO sanding is permitted. Comments??? CVJ |
#4
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I found this reference on the web today:
-----------------quote--------------------------------------- Petit Ultima SR Multi-Season ablative, rebunch without recoating formulated to provide the best antifouling protection, along with ablative technology which allows for controlled wearing away of paint film. This not only supplies a continuous source of fresh biocides but will not build up on your boat, allowing for a smoother slime-free surface with no sanding. Provides multi-season protection even after winter storage. -----------------unqt----------------------------------------- Sounds like sanding is NOT required. Claus "just me" wrote in message ... It would seem that a call to the manufacturer or their rep would provide the answer. -- "Keith Hughes" wrote in message news We've never found sanding to be necessary. Our boats have always been in San Diego, and we power wash, sand out chips, flakes or cracks, prime bare spots, and cover with 2 coats of paint to hull, 3 coates at the waterline and all leading edges. This is good for about 3 years on average, with monthly cleanings. In warmer water...I can't say. Keith cvj wrote: We are about to take a 4-year old Bavaria 38 Ocean to a boat yard to get a new application of anti-fouling paint on the bottom. The boat's previous owner advised us that "the antifouling paint used is Petit Ultima SR, applied over a blue signal (base) coat. Apply 3 to 5 coats of red anti-foul paint, depending on the location (5 coats on leading edge of keel, stem, rudder, high wear areas ) and that just pressure wash until the blue signal coat appears. No surface prep is required other than the pressure wash - let the water dry off, and just roll on the new coat(s). Sanding is verboten.The paint is a soft, copolymer ablative which retains 100% effectiveness all the way through as it wears away" The boat yard says that it is nexccessary to sand the bottom lightly before applying the anti-fouling paint...and that they will not guarantee the work if the bottom is not sanded. The previous owner has always been reliable in his advise and I do not feel comfortable going against his recommendation that NO sanding is permitted. Comments??? CVJ |
#5
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Found the manufacturer's website at www.pettitpaint.com and sent them an
email requesting their recommendations. Will post reply here. Claus "cvj" wrote in message ... I found this reference on the web today: -----------------quote--------------------------------------- Petit Ultima SR Multi-Season ablative, rebunch without recoating formulated to provide the best antifouling protection, along with ablative technology which allows for controlled wearing away of paint film. This not only supplies a continuous source of fresh biocides but will not build up on your boat, allowing for a smoother slime-free surface with no sanding. Provides multi-season protection even after winter storage. -----------------unqt----------------------------------------- Sounds like sanding is NOT required. Claus "just me" wrote in message ... It would seem that a call to the manufacturer or their rep would provide the answer. -- "Keith Hughes" wrote in message news We've never found sanding to be necessary. Our boats have always been in San Diego, and we power wash, sand out chips, flakes or cracks, prime bare spots, and cover with 2 coats of paint to hull, 3 coates at the waterline and all leading edges. This is good for about 3 years on average, with monthly cleanings. In warmer water...I can't say. Keith cvj wrote: We are about to take a 4-year old Bavaria 38 Ocean to a boat yard to get a new application of anti-fouling paint on the bottom. The boat's previous owner advised us that "the antifouling paint used is Petit Ultima SR, applied over a blue signal (base) coat. Apply 3 to 5 coats of red anti-foul paint, depending on the location (5 coats on leading edge of keel, stem, rudder, high wear areas ) and that just pressure wash until the blue signal coat appears. No surface prep is required other than the pressure wash - let the water dry off, and just roll on the new coat(s). Sanding is verboten.The paint is a soft, copolymer ablative which retains 100% effectiveness all the way through as it wears away" The boat yard says that it is nexccessary to sand the bottom lightly before applying the anti-fouling paint...and that they will not guarantee the work if the bottom is not sanded. The previous owner has always been reliable in his advise and I do not feel comfortable going against his recommendation that NO sanding is permitted. Comments??? CVJ |
#6
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According to Pettit Paint, it is up to me whether I want to sand or not...so
I guess I won't.. But now I have a new question.....according to my Volvo engine manual, I am cautioned against using a bottom paint containing Copper Oxide, as this might encourage "galvanizing" of the propeller/sail dirve...AND unfortunately, the Pettit Ultima SR does contain copper oxide... So now I am back at the starting point. "cvj" wrote in message ... Found the manufacturer's website at www.pettitpaint.com and sent them an email requesting their recommendations. Will post reply here. Claus "cvj" wrote in message ... I found this reference on the web today: -----------------quote--------------------------------------- Petit Ultima SR Multi-Season ablative, rebunch without recoating formulated to provide the best antifouling protection, along with ablative technology which allows for controlled wearing away of paint film. This not only supplies a continuous source of fresh biocides but will not build up on your boat, allowing for a smoother slime-free surface with no sanding. Provides multi-season protection even after winter storage. -----------------unqt----------------------------------------- Sounds like sanding is NOT required. Claus "just me" wrote in message ... It would seem that a call to the manufacturer or their rep would provide the answer. -- "Keith Hughes" wrote in message news We've never found sanding to be necessary. Our boats have always been in San Diego, and we power wash, sand out chips, flakes or cracks, prime bare spots, and cover with 2 coats of paint to hull, 3 coates at the waterline and all leading edges. This is good for about 3 years on average, with monthly cleanings. In warmer water...I can't say. Keith cvj wrote: We are about to take a 4-year old Bavaria 38 Ocean to a boat yard to get a new application of anti-fouling paint on the bottom. The boat's previous owner advised us that "the antifouling paint used is Petit Ultima SR, applied over a blue signal (base) coat. Apply 3 to 5 coats of red anti-foul paint, depending on the location (5 coats on leading edge of keel, stem, rudder, high wear areas ) and that just pressure wash until the blue signal coat appears. No surface prep is required other than the pressure wash - let the water dry off, and just roll on the new coat(s). Sanding is verboten.The paint is a soft, copolymer ablative which retains 100% effectiveness all the way through as it wears away" The boat yard says that it is nexccessary to sand the bottom lightly before applying the anti-fouling paint...and that they will not guarantee the work if the bottom is not sanded. The previous owner has always been reliable in his advise and I do not feel comfortable going against his recommendation that NO sanding is permitted. Comments??? CVJ |
#7
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I would think you would treat a Saildrive like an outdrive unit and use
paint designed for aluminum - which will probably be a TBT based paint. Use the Petit on the hull. Eric cvj wrote: According to Pettit Paint, it is up to me whether I want to sand or not...so I guess I won't.. But now I have a new question.....according to my Volvo engine manual, I am cautioned against using a bottom paint containing Copper Oxide, as this might encourage "galvanizing" of the propeller/sail dirve...AND unfortunately, the Pettit Ultima SR does contain copper oxide... So now I am back at the starting point. "cvj" wrote in message ... Found the manufacturer's website at www.pettitpaint.com and sent them an email requesting their recommendations. Will post reply here. Claus "cvj" wrote in message ... I found this reference on the web today: -----------------quote--------------------------------------- Petit Ultima SR Multi-Season ablative, rebunch without recoating formulated to provide the best antifouling protection, along with ablative technology which allows for controlled wearing away of paint film. This not only supplies a continuous source of fresh biocides but will not build up on your boat, allowing for a smoother slime-free surface with no sanding. Provides multi-season protection even after winter storage. -----------------unqt----------------------------------------- Sounds like sanding is NOT required. Claus "just me" wrote in message ... It would seem that a call to the manufacturer or their rep would provide the answer. -- "Keith Hughes" wrote in message news We've never found sanding to be necessary. Our boats have always been in San Diego, and we power wash, sand out chips, flakes or cracks, prime bare spots, and cover with 2 coats of paint to hull, 3 coates at the waterline and all leading edges. This is good for about 3 years on average, with monthly cleanings. In warmer water...I can't say. Keith cvj wrote: We are about to take a 4-year old Bavaria 38 Ocean to a boat yard to get a new application of anti-fouling paint on the bottom. The boat's previous owner advised us that "the antifouling paint used is Petit Ultima SR, applied over a blue signal (base) coat. Apply 3 to 5 coats of red anti-foul paint, depending on the location (5 coats on leading edge of keel, stem, rudder, high wear areas ) and that just pressure wash until the blue signal coat appears. No surface prep is required other than the pressure wash - let the water dry off, and just roll on the new coat(s). Sanding is verboten.The paint is a soft, copolymer ablative which retains 100% effectiveness all the way through as it wears away" The boat yard says that it is nexccessary to sand the bottom lightly before applying the anti-fouling paint...and that they will not guarantee the work if the bottom is not sanded. The previous owner has always been reliable in his advise and I do not feel comfortable going against his recommendation that NO sanding is permitted. Comments??? CVJ |
#8
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"Red Cloud©" wrote in message ... On 21 Mar 2005 19:52:08 -0600, Dave wrote: On Mon, 21 Mar 2005 23:37:02 GMT, Red Cloud© said: You don't have to "grind off a layer", but you do need to scour the surface to get it clean and assure a good job. Doesn't the power wash take care of that problem generally? This is the first year I've had an ablative on the bottom, so don't know about that type paint, but for years I found that not sanding didn't have much if any effect on adhesion of the non-ablative. Powerwashing does not do what scouring does, for the same reason that squirting your teeth with a waterpic does not do what a toothbrush and floss can do. It's really not much work to scour the hull, so why even try to cut that corner? red I agree with this. Powerwashing gets the crud off, but going over the bottom with a Scotchbrite pad exposes a clean surface of paint that the new paint can adhere to. I generally go over it lightly with a solvent like Interlux 202 (or is it 216) although I have been told by the boatyard workers that this is not necessary. Only takes a few of minutes so what the heck. Have never had any problems. Doug s/v Callista |
#9
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wrote in message oups.com... I would think you would treat a Saildrive like an outdrive unit and use paint designed for aluminum - which will probably be a TBT based paint. Use the Petit on the hull. Eric I thought TBT paint was illegal? cvj wrote: According to Pettit Paint, it is up to me whether I want to sand or not...so I guess I won't.. But now I have a new question.....according to my Volvo engine manual, I am cautioned against using a bottom paint containing Copper Oxide, as this might encourage "galvanizing" of the propeller/sail dirve...AND unfortunately, the Pettit Ultima SR does contain copper oxide... So now I am back at the starting point. "cvj" wrote in message ... Found the manufacturer's website at www.pettitpaint.com and sent them an email requesting their recommendations. Will post reply here. Claus "cvj" wrote in message ... I found this reference on the web today: -----------------quote--------------------------------------- Petit Ultima SR Multi-Season ablative, rebunch without recoating formulated to provide the best antifouling protection, along with ablative technology which allows for controlled wearing away of paint film. This not only supplies a continuous source of fresh biocides but will not build up on your boat, allowing for a smoother slime-free surface with no sanding. Provides multi-season protection even after winter storage. -----------------unqt----------------------------------------- Sounds like sanding is NOT required. Claus "just me" wrote in message ... It would seem that a call to the manufacturer or their rep would provide the answer. -- "Keith Hughes" wrote in message news We've never found sanding to be necessary. Our boats have always been in San Diego, and we power wash, sand out chips, flakes or cracks, prime bare spots, and cover with 2 coats of paint to hull, 3 coates at the waterline and all leading edges. This is good for about 3 years on average, with monthly cleanings. In warmer water...I can't say. Keith cvj wrote: We are about to take a 4-year old Bavaria 38 Ocean to a boat yard to get a new application of anti-fouling paint on the bottom. The boat's previous owner advised us that "the antifouling paint used is Petit Ultima SR, applied over a blue signal (base) coat. Apply 3 to 5 coats of red anti-foul paint, depending on the location (5 coats on leading edge of keel, stem, rudder, high wear areas ) and that just pressure wash until the blue signal coat appears. No surface prep is required other than the pressure wash - let the water dry off, and just roll on the new coat(s). Sanding is verboten.The paint is a soft, copolymer ablative which retains 100% effectiveness all the way through as it wears away" The boat yard says that it is nexccessary to sand the bottom lightly before applying the anti-fouling paint...and that they will not guarantee the work if the bottom is not sanded. The previous owner has always been reliable in his advise and I do not feel comfortable going against his recommendation that NO sanding is permitted. Comments??? CVJ |
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