Post by meI see that my slang was a bad idea. We used to call it red lead, but I
think it was really "spot putty". Came in a large tube about 2" in
diameter and 8" long. Seemed like primer that had the consistency of
peanut butter coming out of the tube.
So, let's change my post... anyone using "spot putty" anymore?
Well, sure! Great as a top layer if I did a less than perfect body-
filler job, or filling small dimples and gouges that fall between the
realms of filler and high-build primer. Used some just today. It'll
be ready to wet-sand, let dry, and prime tomorrow. I've used it to
finish off a hole in a hollow interior door (destined for a fairly
dark and opaque stain) as well, and that sort of thing.
Perhaps it's a generational thing, but I myself have never used lead,
reaching instead for Bondo or reinforced fillers as step one.
Pulling or welding/brazing to minimize a deep dent, and doing what you
can behind the scenes to prevent flexing of the panel in service, is
important as "step zero" no matter what filler you're using, of
course. As various websites on the subject point out, any filler is
superficial stuff, limited in depth compared to properly shaped and
reinforced sheet metal of adequate gauge, and the more it just sits
there without anything near structural levels of tension, compression,
or torsion, the happier it (and the paint job above it) will be. See
for instance
http://www.alfabb.com/bb/forums/car-restoration/19357-body-filler-lead-one-mans-opinions.html
Cheers,
--Joe