I've got rust developing on a small spot on the roof (where a part of my rack
rubbed away the paint), by the rear fender (where the seam right around the
wheel was ripped slighly open in a small accident and the paint damaged), and
in a couple of other tiny spots.

4 months ago the van was totally rust-free and I'd like to do my best to stop
it.  The basics I know how to do are:  1) sand the rust away  2) use primer
3) repaint.

Are there any other special tricks or advise?  Special products?  I saw a
some sort of rust-problem-solver pen-looking thing made by 3M.  Gimmick?
Naval Jelly?

Thanks,

Doug Demarest
Minneapolis, MN
86 Vanagon "kombi"