boot almost back to bare metal. i've been stripping the paint with orbital air-compressed sanders. which you can see in one of the following pics of the roof. in the spray bottle is rust converter. only small rust spot on bottom right corner but i still sprayed the whole boot and then wipe it down with a rag. with the spray bottle you can spray in to all the crooks and crevices and i've found you get better coverage and rust converter lasts longer.