My deuce engine "fins" are looking pretty poor on the front side of the engine just behind the front tire...They are just not silver bare aluminum looking like the right and left side. Do you think s100 or pig spit will get rid of that? or do you think i need to lightly sand the fins with a high grit to get the original look back? I don't think the previous owner was too picky about it(maybe rode in the rain alot). Now I gotta clean up his mess hahah..