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Old 05-08-2011, 08:11 PM
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Primer lifting.

I put a coat of epoxy on a bedside of my truck (97 dodge ram 2500) to protect it so I could move on to the next panel and the primer lifted to where I could scrape it off with my fingernail in two small spots where the body lines form a concave U shape. I cleaned the truck very well and then used a wax and grease remover and waited to make sure there were no solvents under the primer. The only thing I can think of is I didnt scuff the area well enough and the primer just didnt adhere. Is there anything else that could cause this to happen and should I just sand the primer off scuff and spot prime over it? Thanks guys

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Old 05-09-2011, 11:05 AM
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With you saying it's concave would make me believe that it has collected something to pollute that area and when it was cleaned it did not get cleaned well. Sand out the bad area, feather out about 3-4 inches further around the area, scuff lightly another 8 inches around the area (320 or, 400), clean it with a good wax remover, re-spray.
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Old 05-11-2011, 05:19 AM
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Epoxy is best over bare metal.Using it over painted surfaces isnt using it to its full potential......Even if you sanded and preped everything right,whos to say that the previous paint jobs underneth were done right...The solvents in the epoxy can get under the top surface and wrinkle poorly preped paint from years ago....It's best to strip, but scratch the wrinkle with your fingernail and its a pretty good bet theres some shinny paint under there....If your not stripping then a 2k primer would be the product to use..
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Old 05-11-2011, 08:02 PM
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The paint is a bit shiny underneath and it is real close to the area where I was removing adhesive from a bump strip that was on the truck from factory so I might of had some trace amount of solvent in there that I missed. Thanks for the replies guys very helpful people here.
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