When you remove pieces from the molasses bath, give them a scrub with a scourer pad in fresh water using a full bucket with a capful of white king in it. The white king neutralises the acid in the molasses. Never never never put aluminium in the molasses, it will eat it! The same goes for door handles and mirror mounts which are made from die cast zinc or mazac. The beauty of using molasses over spirits of salts(muriatic acid or dilute hydrochloric acid) is that you can leave something in the molasses for weeks and it will be ok but the acids will eat it all away.