soda blasting may be the bet, not sure if its rough enough to strip the shit off, but sand blasting would be too harsh.
then just a good polish and a protective coat.
if not, medicine man painted his. looked very good, but he did it properly.
most people do it out of a rattle can and in 6 months its f@$ked and looks worse than it started and is just harder to get back to a nice standard