And in the background is Berryman's B-12 aerosol LOL, Sorry just had to jerk your chain a bit LOL 🤣


To the OP, trying the aerosol carb cleaner on the residual black deposits should remove or soften them. if needed while wet with the aerosol stuff, Scrubbing with a wire brush would be helpful but will likely discolor/polish the aluminum. might try a shop towel / wash cloth. Wooden q-tips come in handy as well