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Thu, May 19 2022, 02:33Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 123456[7]8910 ]

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Date Posted: - Monday - 04/23/07 - 1:22pm
Author: Randall, M31, Murre
Subject: Bottom Paint Combinations

A question of a different type.

It's "common knowledge" in the yard and I've read in such sources as Don Casey that one should not apply ablative (soft) bottom paint over vinyl (hard) bottom paint. But no source Ive read says why.

Then this quote from the April 2007 issue of CLASSIC BOAT, pg 56.

If you are antifouling a bare wooden hull its a good ideaafter first thoroughly priming the hull, say five coatsto lay down an initial coat of hard antifouling before adding the eroding, which will then be replaced each year.

Granted our hulls aint wood, and maybe the mixtures in the British paint tins are less discriminating than ours. But I think its still a worthy question.

And selfish. I ask because I applied hard paint a few years back (wont go into why but it had nothing to do with racing) and now wish I hadnt but have no desire to pull it off.


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[> The West Advisor says it is "OK" -- Capt'n Mike, - Monday - 04/23/07 - 5:59pm

The West Advisor states that ablative/copolymer paints CAN be applied over most other types of antifouling paints. See page 277 of the 2007 West Marine Catalog. It states that an ablative can be applied over a vinyl paint by sanding the old vinyl paint "well" before application of the new ablative paint. If the old bottom paint is actually a modified epoxy (Trinidad, etc.) then even less sanding of the old bottom paint is required.

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[> Go for it, Randall -- Bill Kranidis, - Monday - 04/23/07 - 10:08pm

Just make sure whatever color ablative you use, the hard paint underneath will show it's colors when the ablative starts wearing out. Then you'll know it's time for another coat of ablative.


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[> Ah, I get it... -- Randall, - Wednesday - 04/25/07 - 1:03pm

Ya, so I reread Casy and I'd totally missunderstood. Took him to mean soft and hard bottom paint incompatible always, whereas he's saying same as you guys: soft over hard, ok; hard over soft, not ok.

Thanks for the help.


PS. and I'd swear I heard this in the yard too. Oh well. Guess that's why we ask...

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