I quite often strip the color from a new color cased action by using Lysol thick toilet bowl cleaner AND 0000 steel wool. After allowing the action to warm up from setting in the sun, I coat it with toilet bowl cleaner and scrub with the steel wool. It may take you a while but the finish will soon look like freshly polished steel. My next step is eo coat it in a thick layer of filthy disel crank case oil & allow to set for a few hours. Repeat this process until metal is as gray as you like.
FWIW, Ken
