In a message dated 9/28/99 10:00:38 AM Eastern Daylight Time,
gmbulley@BULLEY-HEWLETT.COM writes:

<< If you have neither the luxury of a garage, nor a second vehicle for use on
 salty days, you still have many defenses. Undercoat everything on your van
 with two coats of Kool Patch. Then, pull the interior, undercoat
 everywhere, and spray all the seams and creases inside the van with 3M rust
 preventative, Kroil, or Waxoil; all of which are thick waxy coatings which
 seal out moisture. Seal 3-mil moisture barrier behind all panels.
  >>

thick layers of tarry spray on undercoating can actually lead to rust, by
trapping water underneath the undercoating, where it never dries out. if you
must use some sort of spray on undercoating, i'd reccomend the parrifin waxy
style undercoatings, which seep into cracks better, and are sprayed on at a
high temp, so they are very liquid, then dry.  the less coats, the better.
the more thick the undercoating is, the more the likelyhood it will seperate
from the body, leaving pockets behind that trap moisture/dirt.
chris