Ablative paint to cured barrier coat? - SailNet Community

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Old 03-19-2014
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Ablative paint to cured barrier coat?

When I was applying barrier coat to my rudder this past weekend (after many repairs), it never occurred to me that I would want to apply the bottom paint (Micron extra) in the "hot" fashion before full cure.

Well, now I realize that was a mistake. Given that, what is the best method to apply the ablative over the barrier coat?

Details:

Barrier coat: 5 coats of epoxy, the last 3 of which were mixed with West 422 barrier coat additive.

Paint: Micron extra

My best guess of what to do:

1)Clean off amine blush by washing entire surface with warm water and a blue scrubby.
2) Lightly scuff surface with 220 grit sandpaper
3) Wipe down with rubbing alcohol for final dust/grease removal
4) Paint with bottom paint.

How long between coats of bottom paint?

Any tips/tricks/advice to improve my plan?

Thanks all!
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Old 03-19-2014
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Re: Ablative paint to cured barrier coat?

Ask your questions here:

Antifouling - Yachtpaintforum.com - Page 1
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Re: Ablative paint to cured barrier coat?

A good primer is a must on the barrier coat to get the bottom paint to properly adhere. A good scuff with 80 grit on the barrier coat then a primer should do the trick.
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Re: Ablative paint to cured barrier coat?

rubbing alcohol isopropal contains a very small amount of oil bittering agent, not a good thing. "IF" you can obtain pure alcohol it is much better.
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Re: Ablative paint to cured barrier coat?

Quote:
Originally Posted by aeventyr60 View Post
A good primer is a must on the barrier coat to get the bottom paint to properly adhere. A good scuff with 80 grit on the barrier coat then a primer should do the trick.
Do you know of a good type/brand of primer appropriate for this?

FstBttms, Thank you - I'll ask this question there too.

desert rat, sorry I said rubbing alcohol but in fact I use denatured alcohol bought from the solvent section at Lowe's/Homedepot. Is denatured alc any better or worse than acetone? Acetone dries so fast the rag is often dry before I'm done wiping down the surface..
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Re: Ablative paint to cured barrier coat?

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Originally Posted by Reefpoints View Post
Do you know of a good type/brand of primer appropriate for this?
Ask the paint manufacturer. Nobody knows paint better than the company that makes it.
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Re: Ablative paint to cured barrier coat?

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Originally Posted by mitiempo View Post
Ask the paint manufacturer. Nobody knows paint better than the company that makes it.
Ditto that! As I recall, there's a customer service number on the can's label. I have called them and talked directly with a technician who really knew the products.
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Re: Ablative paint to cured barrier coat?

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As I recall, there's a customer service number on the can's label. I have called them and talked directly with a technician who really knew the products.
It is in their best interest that you get good long term results.
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Re: Ablative paint to cured barrier coat?

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Wow, that is one rough site. At first it wouldn't let me register since it had identified me as spam! I'm not spam, I promise. (It eventually allowed me after I turned off my proxy and VPN - I guess it wants a resolvable ip address...)

Then it won't let me post a new thread until an administrator activates my account. Sheesh - all for a paint forum!
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Re: Ablative paint to cured barrier coat?

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Originally Posted by Reefpoints View Post
Wow, that is one rough site. At first it wouldn't let me register since it had identified me as spam! I'm not spam, I promise. (It eventually allowed me after I turned off my proxy and VPN - I guess it wants a resolvable ip address...)

Then it won't let me post a new thread until an administrator activates my account. Sheesh - all for a paint forum!
Not every forum lets anybody in like this one.
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