i picked up a N.O.S steering box for my '41 dodge military truck. they covered it with canvas and cosmoline back in the day. I cleaned it all off with wd40 ( what a mess!) and painted it up. Went to fill it with corn head, and found it had it on the inside too! i greased it up anyways, but now im wondering if i should have tried to clean it out? consulting the elders here.