I'd try to neutralize the rust with something like Rustoleum's rust reformer.
Someone once told me the Navy uses 2 coats of rust reformer to treat rusted metal
before painting.  It would be interesting to find out if they have anything
better than that now.

Douglas Demarest wrote:

> 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"

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