Right, been trying to get my mate for 2 days now but hes on holiday. So, anyone know on here what this chemical is that when you put it on rust it supposed to alter the chemicals in the rust to cure it sort of thing? Cant think of the words lol(beer).

All it is, my shell has some surface rust that is some places has started to pitter the metal, not its now worth cutting it out for this and normally i would spot blast these little areas but i was wondering what this chemical was like.....save all the mess from the blast etc