Hi all,
Now approaching what I thought might be the end of a six month rebuild of a
small wooden 'double ender' 18ft, I have painted from the bare wood with
'normal' enamel paints, ie aluminium primer, undercoats and gloss layers. I
began to apply the anitfouling paint as almost the last paint to be applied
and as soon as it hit the bottom, the gloss paint wrinkled up in a horrible
paint reaction.

I have spoken to the manufuacturers 'helpline' who says I should have
applied primer followed by the AF paint with any gloss ontop of that, i.e.,
strip it off and start again.

Before I break down and sob / commit self & boat to a Viking funeral, are
there any other options, First thoughts are, Is there a compatible oil based
Anti fouling paint out there or..
Can I apply a barrier coat, I notice that its only the gloss layer thats
lifted, so maybe the undercoat or primer can resist the content of the AF
paint.

Any idea's??? apart from taing plenty of petrol for the VF of course! I
can't be the only dummy to have done this.. can I?
regards
Stu K

UK

Stu Knowles wrote:
Hi all,
Now approaching what I thought might be the end of a six month rebuild of a
small wooden 'double ender' 18ft, I have painted from the bare wood with
'normal' enamel paints, ie aluminium primer, undercoats and gloss layers. I
began to apply the anitfouling paint as almost the last paint to be applied
and as soon as it hit the bottom, the gloss paint wrinkled up in a horrible
paint reaction.

I have spoken to the manufuacturers 'helpline' who says I should have
applied primer followed by the AF paint with any gloss ontop of that, i.e.,
strip it off and start again.

No...you're not the only dummy who's done this. I had the same problem
when I applied a new bottom paint that was incompatible with the
previous bottom paint used by the boat builder...we'd sand blasted it,
but hadn't stripped every last bit of it off. Within minutes it began to
"boil" and raise blisters. The only solution was the advice you've been
given: strip it all off and apply two coats of primer (make sure you use
the right primer as recommended by the new paint mfr) 24 hrs apart to
create a barrier coat before applying bottom paint.

I was just as thrilled to learn that as you are. But it's the only
thing that will work.

--
Peggie
----------
Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://69.20.93.241/store/customer/p...40&cat=&page=1

On Mon, 02 Aug 2004 15:03:06 GMT, "Stu Knowles"
wrote:

Hi all,
Now approaching what I thought might be the end of a six month rebuild of a
small wooden 'double ender' 18ft, I have painted from the bare wood with
'normal' enamel paints, ie aluminium primer, undercoats and gloss layers. I
began to apply the anitfouling paint as almost the last paint to be applied
and as soon as it hit the bottom, the gloss paint wrinkled up in a horrible
paint reaction.

I have spoken to the manufuacturers 'helpline' who says I should have
applied primer followed by the AF paint with any gloss ontop of that, i.e.,
strip it off and start again.

Before I break down and sob / commit self & boat to a Viking funeral, are
there any other options, First thoughts are, Is there a compatible oil based
Anti fouling paint out there or..
Can I apply a barrier coat, I notice that its only the gloss layer thats
lifted, so maybe the undercoat or primer can resist the content of the AF
paint.

Any idea's??? apart from taing plenty of petrol for the VF of course! I
can't be the only dummy to have done this.. can I?
regards
Stu K

No primer under bottom paint.

On Mon, 02 Aug 2004 09:29:19 -0700, P.C. Ford
vaguely proposed a theory
.......and in reply I say!:

remove ns from my header address to reply via email

Any idea's??? apart from taing plenty of petrol for the VF of course! I
can't be the only dummy to have done this.. can I?
regards
Stu K

No primer under bottom paint.

So does the bottom paint _provide_ a primer coat? I certainly never
thought of it like that.

Having said that, the boats I have antifouled have been two-packed. I
did not apply gloss to the bottom, as it was a waste if time. But they
were primed and undercoated.

I see some incosistencies here (the whole thread. Not just that bit).

The gloss lifted under the bottom paint (or did the whole lot lift?).
The manufacturer says to apply primer, _then_ bottom paint, then
gloss. But what about next year, or 6 months from now in some places?

In the end I guess the only safe way is to use a "system" or get
assurances from makers that their paints are compatible.


************************************************** ***
It's not the milk and honey we hate. It's having it
rammed down our throats.

No primer under bottom paint.

Ordinarily that would be true...but a primer IS needed if a barrier coat
is needed between incompatible paints.

Btw...I seem to be able to reply but not to post an original topic...so
(off this topic but relevant to the group):

In 1981 my father bought a set of plans from Stevenson Projects, Inc for
the "Weekender Friendship Sloop"--a cockpit trailerable centerboard
sailboat that (according to the literature) sleeps 2 comfortably.
Surprisingly, I discovered that Stevenson is still in business...and
even more surprised to discover that this boat is currently featured on
this website:
http://sailing.about.com/library/wee...htm?once=true&

Dad never built it...in fact, I doubt he ever took the plans out of the
envelope more than a couple of times to dream over it...so they're all
here, along with some additional literature for tarps etc.

Stevenson's own website offers the Weekender plans for $35 including
postage in the US and Canada. I'll even pay the postage to send 'em to
the first person who asks me nicely.

email me at peg(dot)hall(at)sbcglobal(dot)net

--
Peggie
----------
Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://69.20.93.241/store/customer/p...40&cat=&page=1
http://shop.sailboatowners.com/detai...=400&group=327

On Tue, 03 Aug 2004 01:23:56 GMT, Peggie Hall
wrote:

No primer under bottom paint.

Ordinarily that would be true...but a primer IS needed if a barrier coat
is needed between incompatible paints.

You are correct of course. I forget that sometimes people work on
boats made out of materials other than wood.

Actually, if my memory of those long past days working in a shipyard
is correct, the order of bottom paint application on steel is primer,
barrier coat, bottom paint.

There is just something completely inconsistent in that statement.

The entire concept of 'bottom paint' - Anti-Fouling - is to 'reject
attachment'. That is to prevent the typical flora & fauna from growing on an
underwater structure. This is usually achieved by the use of some kind of
chemical COMBINED with a carrier that either sloughs off {Rosin's or
Ablative's}or is so 'slippery' {Teflon, Vinyl's}that anything has difficulty
attaching.

Therefore, it goes against reason that any kind of finish - let alone a
'Gloss Finish' - would be recommended over an Anti-Fouling coating.

There is one particular circumstance where I have used a 'Gloss Finish' on
the bottom of a sailboat. The boat was 'dry sailed' - that is it spent most
of the time out of the water, stored on it's trailer. A Gloss Finish was
applied - then, when thoroughly cured, it was heavily waxed. {There are even
special waxes that are used as an 'anti-fouling coating' in waters of low
fouling, or fresh water}. Even so, it spent no more than several days at a
time in the water - after which it was well washed.

Regards & Good Luck,
Ron Magen
Backyard Boatshop

"Old Nick" wrote
SNIP
The manufacturer says to apply primer, _then_ bottom paint, then gloss.

On Tue, 03 Aug 2004 14:42:18 GMT, "Ron Magen"
vaguely proposed a theory
.......and in reply I say!:

remove ns from my header address to reply via email

There is just something completely inconsistent in that statement.

The entire concept of 'bottom paint' - Anti-Fouling - is to 'reject
attachment'.

Sorry. Yeah. That was my other point (I started _out_ with that in
nind, then got lost! G)
************************************************** ***
It's not the milk and honey we hate. It's having it
rammed down our throats.