The process is pretty simple. The rusty tank (or bicycle frame, 1920 Model-T chassis, or pirate ship anchor ) is blasted with a pressure washer to remove loose rust and then submerged in a vat of Rusteco solution for a number of days, depending on the severity of the corrosion (my tank spent 5 days in the fluid). When the item is pulled from the bluish brine, it’s miraculously clean of rust. Such was the case with the MB tank. Where before there was thick red scale, now there is bare, exfoliated metal. Unfortunately, in some places the rust was all there was, so I’ve got a few pinholes to deal with. An epoxy tank sealant should take care of the holes and prevent any further corrosion.