Section Ill. RUSTPROOFING PROCEDURES
Do not spray any portion of moving compo-
nents, transmission, transfer case, cylin-
ders, pumps, valves, prop shaft, exhaust
system, rubber bump stops, brakedrums,
brake backing plates, parking brake linkage,
shift linkage, tires, electrical components,
engine linkages, or air intake systems. Cov-
er all areas with paper where necessary.
Figure 4-10. Rustproofing Firewall.
There are areas where a 10 mil wet film
Compartment Rails (see
d. Rustproofing Crew
thickness cannot be obtained without
wasting a large amount of compound. In
those areas, complete coverage of the
(1) Insert 90 degree short tool into hole A of
surface area is necessary at whatever
the inner rails as far as possible, then spray in all
thickness is obtainable.
For rustproofing procedures of specific
Plug all holes.
(3) Use short rigid tool to sprav the floor areas
under the gas tank and all areas including the
a. Dry Film Thickness Requirements, A five mil dry
film thickness is required for adequate rustproofing
protection. A 10 mil wet film thickness is required to
obtain a minimum five mil dry film thickness. If
needed, the vehicle can be resprayed to reach proper
b. Spraying Pressure. The rustproofing compound
should be applied to sheet metal and structural
members in even coats. Spraying pressure should be as
low as possible while maintaining an even spray pattern.
An acceptable starting point is 40 psi (276 kPa), but
adjustments may have to be made, due to temperature
changes and differences in rustproofing compound.
Using too much pressure will waste compound by
causing overspray and excessively thick coatings.
Figure 4-11. Rustproofing Crew
(1) Insert flexible tool as far as possible into
firewall holes A and B, then spray in all directions while
C a r r i e r (see
slowly withdrawing tool. Enlarge holes to allow entrance
of flexible tool, if necessary.
B, and C of the spare tire carrier, then spray in all
(2) Plug all holes.