Bench Seats, Having them Reupholstered

[hatzie]

Black oxide may be faster and more durable than paint for parts like springs.
The industrial process name is Oxide passivization.
It's similar to Bluing and Parkerizing on firearms. You're using a chemically produced oxide of Iron to provide corrosion protection.

Caswell sells kits that work well.

This guy uses dirty motor oil as a final step. I use clean motor oil.

http://www.youtube.com/watch?v=GwC9-dx9XLo

I've used black oxide on threaded hardware and washers, Zinc plating with Chromium yellowing on carburetor bodies to mimic the original cadmium plating, and electroless copper and nickel on machine tool handwheels.