If they are metal and chrome a fine steel wool pad will work wonders.For aluminum I use 1k grit "wet sand" paper and 3m rubbing compound and the green scotch pad.After all that if you can fined it wynol I'm not sure on the spelling sorry.There is some other stuff that comes in a silver can and it's like a roll of cotton inside but man does it work sorry can't think of the name right now.
That can is called never dull