"ACH" wrote in message
...
I was told that if you use or paint rust paint on a car over
rust spots and later paint over the rust paint with regular
auto paint, the auto paint will peel off. Some rust paints even
say on the label like "Do not apply paints containing strong
solvents over this rust paint", etc.

Why is this?

What should you do if you have a car with some rust paint on the
trunk and fenders?

Does rust paint really reduce the chances of the rust coming back
or would just cleaning the rust off and using regular auto paint
just as good?

Any advantages to using rust paint (besides not needing a primer)
and any differences between the brands?

I have been doing a bunch of searching on the rust/primer issues (and
got some good comments from this group a while back also)
and have found some links you might find interesting. They discuss
primers, etch etc.

http://207.44.196.117/vboard/showthread.php3?t=129741
http://www.por15.com/
http://www.prp-porstore.com/
http://www.zerorustusa.com/
http://www.zerorust.com/
http://www.autobodystore.com/new_page_1.htm

So far, the idea I like best is to use a metal prep like
Picklex http://www.autobodystore.com/r-o-n.htm
or the "Metal Ready" (lightly etch and leaves zinc phosphate)
http://www.prp-porstore.com/page/por15/PROD/Prep/MR
applied with gloves and scotchbrite to help abrade the surface
slightly and work the coating on. Let it sit per the instructions
then paint with either the zero rust or POR-15. Several
people have also suggested using the spray
on bedliner stuff as a top coat for stuff.

mikey