Has anyone who has done an off-the-frame restoration had their frame hot
zinc dipped ("galvanized")? There is a company in Nashville TN that has a
40' long tank of molten zinc that they use mostly for coating structural
members but is big enough to put a car frame wide item of up to 40' long
in. They also have an acid tank for cleaning and prepping the metal. This
would coat the inside and outside of the frame members with zinc, which
would preclude rust for just about ever.
For metal restoration there is a franchise chain that does metal
cleaning. Oxalic acid removes rust, as does phosphoric acid
("Metal-Prep"), which leaves a thin coat of iron phosphate that protects
from future rust until the metal can be painted (or zinc coated).
Al