why not try Simple Green, Alcohol and Water mixed in a spray bottle. Water cuts the Simple Green, Alcohol provides a quicker drying agent. Simple Green cleans. If it's belt marks you're trying to rid of, use this with a little 'elbow grease' and things should be okay.
NOTE: This applies if you're cleaning by hand. If you've a spinner, I'd suggest using a cleaning/polish solution (i.e. Clean N Dull)
HTH
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Proud member of the Track Revolution
"He who knows little ... often repeats it!"