Seam rust is IN! the seam and can't be fixed without taking the seam apart IMHO.  Fixing the
outside, visible rust, will last for about 6 months then the rust will etch back under the paint
to the outside where you can see it again (just after your paint job guarantee expires).

IIWY. I'd go to Krown.com and find someone who will send a bottle/can of the Krown rust prevention
oil to you. Then I'd get the visible rust fixed as best I could.  Then I spray the Krown oil in
from behind the seam.  A yearly application will STOP the rust, not fix it, but stop it.  I speak
from experience up here in Canada.  M

--- Peter Linsley <peter.linsley@GMAIL.COM> wrote:

> Any tips on folk who can do a good fixup job on seam rust in the Bay
> Area? I've got a couple of pretty nasty bubbles and probably some ugly
> rust under the kitchen in my camper. Cheers.

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