In Reply to: Re: Buford posted by Jack - Iowa on November 28, 2018 at 16:41:06:
The photo above shows a flathead V8 oil pan after about 3 hours. It's tied to a stick of wood to hold it off the sacrificial basket. This photo was just prior to flipping it over to do the other end.
The black powdery stuff is just a mixture of loose iron metal and iron oxides. It easily washes right off before wiping the part down with rubbing alcohol and shooting primer.