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Old 30-04-2012, 05:11   #1
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Join Date: Aug 2005
Location: Providence, RI
Boat: Outbound 44
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Compatible Bottom Paints

If you don't know what the previous owner used on the bottom of the boat, how do you know if the stuff you're about to put on is compatible?

Last year I put Micron 66 on the bottom of Toodle-oo! It did well, I was happy when she was hauled last year... but... in reviewing it this Spring, I see that much of the bottom paint is now flaking off. Is this because of an incompatible previous coat, or perhaps because the Micron 66 has dried out over the winter and is now flaking. (Yes, I wish I had paid closer attention last year when she came out of the water...)

If paint is incompatible with the previous layer, does it show that fact immediately upon application?

Bill Balme
s/v Toodle-oo!
Outbound 44 #27
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Old 30-04-2012, 05:59   #2
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Re: Compatible Bottom Paints

Micron 77 is probably a better choice for overcoating unknown anti-foulings, than is 66.
See the compatibility charts.

Boatpaint Ltd International Micron 77

"... The compatibility of antifouling is vitally important, so if an antifouling system currently exists on the vessel, check the compatibility of the new antifouling to be applied. It may be necessary to remove the current coating or to apply a barrier coat. A barrier coat or back-up coat is particularly applicable if using Micron 66. .."
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

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bottom paint

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