Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums General Petroliana Discussion How to clean a tin sign?

I've had some decent luck with cleaners having bleach added but without ammonia.
I have also used WD-40 depending on the situation. Gasoline, Paint thinner (NOT lacquer thinner).

I have never used steel wool on a metal painted sign....not my religion. I usually finish a decently cleaned sign with Macguire's cleaner wax in the dark red bottle.