Acrylic Enamel over Epoxy Primer??

please give the answer quickly

regards
K.Siva kumar

I would do as CNKS says and sand the laquer. I wouldn't try remove all of it, just block the fender well to level all the surfaces.

Some say to let the E-prime dry 24 hours. General Motors lets their E-prime dry less time than that and look how their vehicles are starting to look after 10 years or so. The tops of the doors, fronts and tops of hoods and, roofs are shedding paint like a snake sheds it skin.

Next time you see a silver of metalic gray GM vehicle about 10 years old look at it closely and you can see where the paint is starting to peal. We call them "GM Pealers".

Anyway back to the subject. As soon as the primer is applied, You should apply the top coat. You don't want the primer dripping wet, just soft to the touch.

I would do as CNKS says and sand the laquer. I wouldn't try remove all of it, just block the fender well to level all the surfaces.

Some say to let the E-prime dry 24 hours. General Motors lets their E-prime dry less time than that and look how their vehicles are starting to look after 10 years or so. The tops of the doors, fronts and tops of hoods and, roofs are shedding paint like a snake sheds it skin.

Next time you see a silver of metalic gray GM vehicle about 10 years old look at it closely and you can see where the paint is starting to peal. We call them "GM Pealers".

Anyway back to the subject. As soon as the primer is applied, You should apply the top coat. You don't want the primer dripping wet, just soft to the touch.

CNKS is correct about the epoxy windows. I have never seen any manufacturer's recommendation to topcoat "while still tacky" though. I would proceed with some caution there. The NASON product you mentioned has a minimum recommended one hour dry time before topcoating. See link. I always recommend following the manufacturer's written instructions. That's the best way to avoid unforseen problems that you don't want.

My experience with epoxy has been with PPG and OMNI, not NASON. They both have definite windows, after which scuff sanding and re-application of the epoxy is recommended for maximum adhesion. The NASON tech sheet is silent about maximum time before scuffing and recoating, saying only that for sanding, wait 24 hours. My feeling is that you would do best to scuff sand your fenders (even to the point of removing the lacquer as CNKS suggests), put on an overall coat of the NASON epoxy and topcoat with your acrylic enamel after one hour and before 24 hours.

Don't forget the induction period mentioned for time between mixing the two epoxy components and spraying.

BTW, your sandblasting and use of epoxy primer is the best preparation you could have chosen for your topcoat, IMO.

Rod

• NASON Epoxy Primer (pdf)