In Reply to: Primer/sealer posted by dave#1 on August 19, 2017 at 09:44:22:
called 'EXTEND' for treating rusty iron and steel. There are two kinds of iron oxide, one is good, one is bad. The bad is red oxide, known as rust. The good is black oxide, where the rust has been neutralized and no longer is corrosive. It is recommended you get as much dirt, grease, grime, and rust off of the metal first. It gets applied in three coats, each sprayed on in about 3 minute intervals. Let dry for 24 hours then ready to prime/paint. It goes on clear, but when dry, it is black. I first tried it on some Ford tractor tools about 15-20 years ago and they are still looking good with no signs of bleed thru rust coming back. Ferrous metals need to be free of rust before painting and best to use a primer first. Black Oxide is used in the industry on many parts -tooling and gaging for two good examples.