I have a Centurion Iron Man 'Miami Vice' bike. It has the yellow and pink paint scheme. It has yellow bar tape, yellow saddle and black tires. I want to swap out the black tires for a pair of older yellow Michelin Pro Race tires I have so I can finish out the yellow theme. They are pretty dirty right now. Does anyone have a sure fire way to clean up these tires so they look like new again? Thanks.