Two part epoxy

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Jul 29, 2012
80
hunter 37 cherubini Apollo Beach
Giving the old gal (1980 37C) a new paint job (deck/cockpit). I want to use a two part epoxy but am unsure of what was used previously (I suspect enamel). Is there any primer I can use that wont eat the old stuff and take a two part epoxy topcoat?
 
Mar 20, 2012
3,983
Cal 34-III, MacGregor 25 Salem, Oregon
epoxy wont "eat" at another paint. depending on the color of paint you are using and the condition on the surface you are painting, a primer may not be necessary unless you need it so hide some light and dark patches, but usually epoxy paint is very heavily pigmented. but no matter if you do use a primer or not, if there is any adhesion problems with what is on the hull right now, whatever you decide to put over it can have the best grip in all the world, but if the existing layer below it lets loose, your paint is going to bubble or fall off.
epoxy paint, like regular epoxy has great bonding capabilities, but it has to have a solid base to bond to.... if the existing paint was put on correctly and is firmly adhered to the hull, then you should have no problems painting over its prepped surface with the two part epoxy alone...
 
May 19, 2012
5
Hunter 27 Sydney
Don't leave the epoxy as the final coat as it will go chalky (whitish) in the sun. Best long term colour holding and gloss will be from a 2 part polyurethane.
 
Dec 28, 2009
397
Macgregor M25 trailer
A lot of the 2 part marine paints are not epoxy, and their solvents are very aggresive. Best is to check with the paint manufacturer for their recomendations and follow them to the letter.

Fred Villiard
 
Mar 20, 2012
3,983
Cal 34-III, MacGregor 25 Salem, Oregon
Don't leave the epoxy as the final coat as it will go chalky (whitish) in the sun. Best long term colour holding and gloss will be from a 2 part polyurethane.
there is epoxy paint available that remains shiny and durable... but its very, very expensive.
 
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