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#1
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Bottom painting
Practical Sailor just had a letter about boatyards not letting ppl do
their own bottom painting but still charging an arm and leg to have the yard do it. My experience is that yards do a crappy job with almost no surface preparation except for a pressure wash. The few times I have allowed a yard to do it was a waste of money as it fouled in less than 3 months. 6 years ago, I hauled my boat and sanded the bottom, applied 3 coats of hard CuO based paint (BottomKote or something like that)and suddenly had to stop sailing due to business problems. My boat sat for 4 years being used very little in a place that fouled heavily. Finally, I had her hauled to be brought to my home and was amazed to find NO fouling at all. A boat next to mine was so heavily fouled it grew oysters. I know from some past experience that my own bottomcoating job is superior to that done by the yardss but this was amazing. Did I do something right or just get lucky? |
#2
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Bottom painting
Parallax wrote:
Practical Sailor just had a letter about boatyards not letting ppl do their own bottom painting but still charging an arm and leg to have the yard do it. My experience is that yards do a crappy job with almost no surface preparation except for a pressure wash. The few times I have allowed a yard to do it was a waste of money as it fouled in less than 3 months. 6 years ago, I hauled my boat and sanded the bottom, applied 3 coats of hard CuO based paint (BottomKote or something like that)and suddenly had to stop sailing due to business problems. My boat sat for 4 years being used very little in a place that fouled heavily. Finally, I had her hauled to be brought to my home and was amazed to find NO fouling at all. A boat next to mine was so heavily fouled it grew oysters. I know from some past experience that my own bottomcoating job is superior to that done by the yardss but this was amazing. Did I do something right or just get lucky? From my experience, yards will use the cheapest formulation that works in their area most years. Frankly, that makes sense. On our first moored boat, I didn't know anything and paid the yard to do the bottom at the start of a particularly bad year. Within a month, the growth was almost 2" thick. They hauled, scraped and recoated the bottom with something better at their cost. Since, I've applied Practical Sailor's recommendations and have had essentially no growth survive the powerwashing. One year, as a test, I didn't overcoat our "hard" paint (supposedly it was "dead" after 6 months' exposure to air. Little survived the powerwashing, but there were a few carcasses of hard growth. I few years ago, I started using an ablative paint and haven't had hard growth survive powerwashing except where I didn't touch up the hard paint showing through (another test). This time, I put two coats at the waterline, a single coat below. We'll see how things worked this year, though of course I don't know how hard our powerwash guy works. -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
#3
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Bottom painting
In catching up with my newsgroups after a long hiatus helping burned out
folks from the San Diego Cedar Mtn fire, I would like to add to Jere's experience with multiple coats. I have berthed my Santana 22 continuously in the water over the past 20 years in both the SF Bay Area and the Oregon Coast where the barnacle growth can be nasty. In both cases I followed the advice of the previous owner to get more than one coat put on when redoing the bottom paint. Hence, I have asked for two coats when I was in the Bay Area and three coats since moving to Oregon. In all instances, I have gone an average of three years between paint jobs with little or no marine growth after pressure washing while neighbors in adjoining berths have had to haul out every year for repainting. In a recent case I went for five years before repainting because of pressures at work and other items taking my attention elsewhere. The yard was prepared for a horror story when I told them of the time since the last haulout, but to our mutual surprise, pressure washing easily removed all growth with no damage whatsoever to the hull underneath and the paint was still intact! My analysis of this is that one coat can have thin spots or bare spots that are missed in moving the support pads around. Two coats reduces this risk and three coats reduces it further. In addition, given the cost of haul out and the time required, the cost of the extra paint is a small portion of the bill and worth the extra assurance. Note that I have had three different yards do this over the years at my request with similar results in each case. This does not mean that one can get by with poor preparation work, but even a good preparation can be undone if the paint is thin in spots or a few small places are missed. Two or more coats helps prevent that occurring. Ken "Jere Lull" wrote in message ... Parallax wrote: Practical Sailor just had a letter about boatyards not letting ppl do their own bottom painting but still charging an arm and leg to have the yard do it. My experience is that yards do a crappy job with almost no surface preparation except for a pressure wash. The few times I have allowed a yard to do it was a waste of money as it fouled in less than 3 months. 6 years ago, I hauled my boat and sanded the bottom, applied 3 coats of hard CuO based paint (BottomKote or something like that)and suddenly had to stop sailing due to business problems. My boat sat for 4 years being used very little in a place that fouled heavily. Finally, I had her hauled to be brought to my home and was amazed to find NO fouling at all. A boat next to mine was so heavily fouled it grew oysters. I know from some past experience that my own bottomcoating job is superior to that done by the yardss but this was amazing. Did I do something right or just get lucky? From my experience, yards will use the cheapest formulation that works in their area most years. Frankly, that makes sense. On our first moored boat, I didn't know anything and paid the yard to do the bottom at the start of a particularly bad year. Within a month, the growth was almost 2" thick. They hauled, scraped and recoated the bottom with something better at their cost. Since, I've applied Practical Sailor's recommendations and have had essentially no growth survive the powerwashing. One year, as a test, I didn't overcoat our "hard" paint (supposedly it was "dead" after 6 months' exposure to air. Little survived the powerwashing, but there were a few carcasses of hard growth. I few years ago, I started using an ablative paint and haven't had hard growth survive powerwashing except where I didn't touch up the hard paint showing through (another test). This time, I put two coats at the waterline, a single coat below. We'll see how things worked this year, though of course I don't know how hard our powerwash guy works. -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
#4
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Bottom painting
On Sat, 22 Nov 2003 09:17:55 -0800, "Ken Shaw"
wrote: ------------------------------ snip ------------------------------- My analysis of this is that one coat can have thin spots or bare spots that are missed in moving the support pads around. Two coats reduces this risk and three coats reduces it further. In addition, given the cost of haul out and the time required, the cost of the extra paint is a small portion of the bill and worth the extra assurance. My little Hunter 310 lives where it must be in a yard over the winter, so hauling out each year is not a separate issue. However, my quick-and-dirty solution to the annual "missed-a-spot" problem with ablative paint is alternating between having blue and red below the waterline. Makes it pretty obvious, either color looks OK on a white hull, and I try not to sail upside down anyway. Fair winds, Al |
#5
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Bottom painting
However, my quick-and-dirty solution to the annual "missed-a-spot"
problem with ablative paint is alternating between having blue and red below the waterline. Makes it pretty obvious, either color looks OK on a white hull, and I try not to sail upside down anyway. We use a wear indicator on our ablative bottom paint. The bottom is first painted black and then covered with blue to go with the white hull and red boot stripe. (I grew up in New England and that was a traditional paint scheme.) We run until a large percentage of black is showing through and then go for a haulout and do it all over again. The boat is in the south and we boat year round. Leanne S/V Fundy |
#6
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Bottom painting
However, my quick-and-dirty solution to the annual "missed-a-spot"
problem with ablative paint is alternating between having blue and red below the waterline. Makes it pretty obvious, either color looks OK on a white hull, and I try not to sail upside down anyway. We use a wear indicator on our ablative bottom paint. The bottom is first painted black and then covered with blue to go with the white hull and red boot stripe. (I grew up in New England and that was a traditional paint scheme.) We run until a large percentage of black is showing through and then go for a haulout and do it all over again. The boat is in the south and we boat year round. Leanne S/V Fundy |
#7
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test
test
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#8
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test
test
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#9
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Bottom painting
On Sat, 22 Nov 2003 09:17:55 -0800, "Ken Shaw"
wrote: ------------------------------ snip ------------------------------- My analysis of this is that one coat can have thin spots or bare spots that are missed in moving the support pads around. Two coats reduces this risk and three coats reduces it further. In addition, given the cost of haul out and the time required, the cost of the extra paint is a small portion of the bill and worth the extra assurance. My little Hunter 310 lives where it must be in a yard over the winter, so hauling out each year is not a separate issue. However, my quick-and-dirty solution to the annual "missed-a-spot" problem with ablative paint is alternating between having blue and red below the waterline. Makes it pretty obvious, either color looks OK on a white hull, and I try not to sail upside down anyway. Fair winds, Al |
#10
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Bottom painting
In catching up with my newsgroups after a long hiatus helping burned out
folks from the San Diego Cedar Mtn fire, I would like to add to Jere's experience with multiple coats. I have berthed my Santana 22 continuously in the water over the past 20 years in both the SF Bay Area and the Oregon Coast where the barnacle growth can be nasty. In both cases I followed the advice of the previous owner to get more than one coat put on when redoing the bottom paint. Hence, I have asked for two coats when I was in the Bay Area and three coats since moving to Oregon. In all instances, I have gone an average of three years between paint jobs with little or no marine growth after pressure washing while neighbors in adjoining berths have had to haul out every year for repainting. In a recent case I went for five years before repainting because of pressures at work and other items taking my attention elsewhere. The yard was prepared for a horror story when I told them of the time since the last haulout, but to our mutual surprise, pressure washing easily removed all growth with no damage whatsoever to the hull underneath and the paint was still intact! My analysis of this is that one coat can have thin spots or bare spots that are missed in moving the support pads around. Two coats reduces this risk and three coats reduces it further. In addition, given the cost of haul out and the time required, the cost of the extra paint is a small portion of the bill and worth the extra assurance. Note that I have had three different yards do this over the years at my request with similar results in each case. This does not mean that one can get by with poor preparation work, but even a good preparation can be undone if the paint is thin in spots or a few small places are missed. Two or more coats helps prevent that occurring. Ken "Jere Lull" wrote in message ... Parallax wrote: Practical Sailor just had a letter about boatyards not letting ppl do their own bottom painting but still charging an arm and leg to have the yard do it. My experience is that yards do a crappy job with almost no surface preparation except for a pressure wash. The few times I have allowed a yard to do it was a waste of money as it fouled in less than 3 months. 6 years ago, I hauled my boat and sanded the bottom, applied 3 coats of hard CuO based paint (BottomKote or something like that)and suddenly had to stop sailing due to business problems. My boat sat for 4 years being used very little in a place that fouled heavily. Finally, I had her hauled to be brought to my home and was amazed to find NO fouling at all. A boat next to mine was so heavily fouled it grew oysters. I know from some past experience that my own bottomcoating job is superior to that done by the yardss but this was amazing. Did I do something right or just get lucky? From my experience, yards will use the cheapest formulation that works in their area most years. Frankly, that makes sense. On our first moored boat, I didn't know anything and paid the yard to do the bottom at the start of a particularly bad year. Within a month, the growth was almost 2" thick. They hauled, scraped and recoated the bottom with something better at their cost. Since, I've applied Practical Sailor's recommendations and have had essentially no growth survive the powerwashing. One year, as a test, I didn't overcoat our "hard" paint (supposedly it was "dead" after 6 months' exposure to air. Little survived the powerwashing, but there were a few carcasses of hard growth. I few years ago, I started using an ablative paint and haven't had hard growth survive powerwashing except where I didn't touch up the hard paint showing through (another test). This time, I put two coats at the waterline, a single coat below. We'll see how things worked this year, though of course I don't know how hard our powerwash guy works. -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
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