I recently got a new van its a 1990 syncro adventurewagen.  My question
is...  Does anyone know a good way to prevent seam rust before it happens.
I got pretty lucky and found a van without the rust that has plauged my
earlier vans.

I noticed some small cracks in the seams beginning to form.  Would a
automotive glazing compound forced into the cracks work?  I don't really
want to have to start sanding and painting.

Thanks!
Michael Blackburn