Thanks for posting the pic of the bass. Looks like a cool find.
I used to use a product called Rust Eraser on old pocket knives to clean up . Basically a rubber pad impregnated with I think fine particles of Silica . Works well on the knives and might be worth a try.
I used to use a product called Rust Eraser on old pocket knives to clean up . Basically a rubber pad impregnated with I think fine particles of Silica . Works well on the knives and might be worth a try.