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Re: epoxy primer wait time

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Author  [Modern View]

06-08-2012 18:13:59

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What brand are you using? True epoxy primer is usually not sandable, at least the PPG version isn't. I put body filler on before the epoxy, if I did put it on after I would probably wait until the next day. Others may have a different answer. PPG Omni MP 170 that I use can be top coated in 30 minutes.

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06-08-2012 23:31:20

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 Re: epoxy primer wait time in reply to CNKS, 06-08-2012 18:13:59  
I am using Nason ful poxy. sounds pretty much the same with topcoat after about 1 hour IIRC. I will give it as much time as possible with plenty of time in the sunshine and temp in the 80's. I was taught to put down the epoxy first to seal up the metal and give a good base for filler and high build primer etc, then finish with another coat of epoxy to act as a sealer before topcoat.

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06-09-2012 08:32:57

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 Re: epoxy primer wait time in reply to ywalk, 06-08-2012 23:31:20  
Every person has his opinion about body filler. It needs at least 80 grit some recommend coarser to get a good bond to the metal. With epoxy you are filling some of those 80 grit marks with primer. I think the person who told you to "seal" the metal was afraid the sanding did not get all the rust. When I sand there is no rust left and none appears before I get the body filler on. I suppose those who live in humid climates can't do that. To me (and I can't prove it, and many will disagree, which is ok), the epoxy will reduce adhesion, as the PRIMARY filler was made to go over bare metal.

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Loren in wi

06-14-2012 19:26:48

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 Re: epoxy primer wait time in reply to CNKS, 06-09-2012 08:32:57  
Body filler will hold better on epoxy than on bare metal. I live in the rust belt, WI, also as a PPG master painter I was told at school to apply before body filler.

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06-15-2012 05:42:47

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 Re: epoxy primer wait time in reply to Loren in wi, 06-14-2012 19:26:48  
I try to follow the instructions that come with the product. Everyone including instructors have their own opinion. I wouldn't mind taking the courses you did, but at this point in my life I don't want to take the time and for me it is only a hobby. What I have done the last 10 years has never failed me.

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