Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums General Petroliana Discussion Cleaning rust that is 'on top' of porcelain

The cost of the small amount muriatic acid needed is a lot less then the cost of buying a plastic tub large enough to fit a large porcelain sign and then buying enough white vinegar to submerge the sign. Not to mention that the results are instantaneous with the acid versus having to wait a week.