In a message dated 14/10/2009 8:36:21 P.M. Eastern Daylight Time,
LISTSERV@GERRY.VANAGON.COM writes:

        Primer sealer is NOT going  to keep the rust at bay - PERIOD !
Wrong stuff, it is not moisture  proof.  Bare & rusted metal need to be treated
with rust proofing  coatings.  I prefer by far POR-15 but there are others
that common body  shops use.  Better do some homework on what's availble to
you BUT I  strongly suggest POR-15, it works hands down.  I have been using
it for  over 20 years and very, very seldom do I see any rust come back and
usually it  can be attributed to poor preperation and coating or the metal
was not able  to be completley encapsulated with POR-15.  With any rust
control coating  the metal MUST be encapsulated, if you cannot or not able to or
not willing to  do this the rust will come back as it will travel up and
under the coating you  applied.  The idea of the coating is to completely seal
the metal from  access of air and moisture so oxidation cannot take place.

>>>>>A few weeks ago I did my seams and surrounding  three inches, at the
typical
rust spot where the camper stuff is welded in  on the drivers side. I ran
out
of time after applying primer/sealer and  thought thats ok to wait a while
at
this stage.......
now we had two  days of solid rain, and I have micro bubbles under the
primer
about an inch  away from the seam, and worse, something slightly rustcolored
at a few seam  spots.
Obviously I have to redo a few things, but I was wondering whether  my
assumption that primer sealer is weathertight was wrong, or if I did  the
whole thing  wrong......<<<<<<<<

Cheers,

Frank  Condelli
Almonte, Ontario, Canada
'87 Westy & Lionel Trains (_Collection for sale_
(http://frankcondelli.com/trainsal.htm) )
_Frank Condelli &  Associates_ (http://frankcondelli.com/busindex.html)  -
Vanagon/Vanagon Westfalia Service in the Ottawa Valley
_Vanagon Stainless Steel Exhaust  Systems_
(http://frankcondelli.com/exhaust.htm)
_BusFusion_ (http://www.busfusion.com/)  a VW Camper  camping event,
Almonte, ON, June 11 ~ 14,  2009