In Reply to: Buford posted by Jim on November 27, 2018 at 21:51:47:
There are two kinds of 'rust', red oxide, the bad stuff, and black oxide, the good stuff. As iron reacts to oxygen and water, it breaks down sort of back to its natural element state. Black oxide transforms the process, neutralizes it so it no longer will break down. The Black Oxide process is used on gages and tooling in industry to prevent oxidation, or rusting. There are a few commercial products you can use on your parts and tools after you have removed all the old rust, crud, and paint and before you paint over with a new finish if you want to preserve them for a long time. I use a product made by PERMATEX on all my parts after I clean them and before I paint them. Originally their product was called EXTEND, but since have just renamed it RUST TREATMENT. EASTWOOD PRODUCTS also makes a good product too. You apply it in three steps, about 2-3 minutes apart. It will dry to a black finish and let set for 24 hours before painting.
"EXTEND" RUST PREVENTATIVE by PERMATEX: