Bodywork over Dp90 Questions...

[Taylor1969]

A warning about DP epoxy primer. You mention there is one coat of DP sprayed on the car. One coat isn't enough! If there isn't enough DFT (dry film thickness) then it would be advisiable to remove the DP by using an orbital sander with #80 grit sandpaper to provide "mechanical adhesion" for filler work.

The DP needs to have a minimum DFT to prevent moisture bleed thru. Best to check an area by sanding. If you happen to see rust underneath the DP, then I would advise you remove it since there isn't much material anyway.

Otherwise, if there was enough DP material applied, you need to scuff the DP where you will be applying filler to aid adhesion. Also, it would be wasteful to dust on a coat of DP over the bodywork area because moisture would bleed thru it. If you plan to spray DP to prevent environmental attack on the bodywork, you must apply at least 3-4 wet coats of the DP to achieve the desired protection.



I would also suggest you acquire a product bulletin to gain more knowledge about the use and "how not to use" DP primers.

Sorry - I shouldn't have said one coat. I meant one application - consisting of two wet coats as reccommended by the DP90 product sheets. It takes some eblow grease to get down to metal at this point. In areas where I plan to apply filler it will be scuffed and/or taken to bare metal depending on what type of repair needs to be made. Thanks for the clarification Alchmist.