A must have in the shop
This is a great product for the easy removal of ALL rust including fine bluing and browning. Leaves a sticky residue on parts (hands and work area as well) that protects against flash rust so you can take a break or even overnight (comes off without effort using TCE, MEK or water). Parts left in a container of the solution will darken, most noticable if all of the part isn't complete covered. It is slow to remove bluing so you can remove rust spots with confidence and touch up with a quick bluing product.
