paint info needed, what is the best primer to use Options

[tdgray]

I've never baked filler and good fillers have little air and don't shrink. Besides, if you work the metal correctly, you should have a very thin coat to finish with.

Doesn't have anything to do with air.

Fillers shrink as they dry, it's a fact. All of 'em. Just some more than others.

I do agree with your comment on sticking with one system though. Certain brands do not interact well. The most specific example of this that I can think of is when GM in the late eighties - early ninties mixed different clears and base coats and had delamination problems, although they blamed the paint companies for it (IMG:style_emoticons/default/wink.gif)

[TBrads914/6]

Most of their problem came from Top Coating over their E-Coat and not using Primer to cut cost (which had their vendors blessings). The problem is that the E-Coat is great for rust protection but UV rays tear it up. The top coat didn't give enough UV protection and the E-Coat for lack of better word started to get "chalky". That caused the problem with the top coat delaminating and flaking off. They learned quickly that the primer coating over the E-Coat (35 microns +) protected it from the UV rays.