My tack welded Super Cub fuselage has been sitting in my garage for a
couple years. I am just now getting around to finish welding it. From
time to time I would just would tend to any areas of surface rust that
appeared with steel wool and WD-40. I guess it depends on your climate
but bare 4130 and minor surface rust isn't going to make your fuselage
turn to fine powder dust. I live in the Northwest and we are not very
humid. Is your fuselage kept outdoors? That would require extra
measures perhaps as was suggested.


mhorowit wrote:
I presented the following problem to a local authority and he suggested
a solution.
Can I get your thoughts on the adequacy of his suggestion?

I'm going to be removing old paint and primer from 4130 over a long
period of time. After a few hours, the bare metal will begin to rust,
so I'd like to protect it until I can apply a two-part epoxy,
probably a month or so later.

He suggests any of the lacquer-based spray-on paints would act as a
barrier, and would not deter two-part epoxy from adhering to the metal
when I get around to applying it.

Your thoughts please? - Mike