Cleaning help

[Henry S. Winokur]

I took a passenger recently and it appears the person was resting at least
part of her shoe on the silencer, as there seems to be a deposit of what
appears to be rubber on it.  What's the best way to clean it off, without
damaging the silencer's finish?

Regards,

Henry S. Winokur
94 GTS1000, AMA, MRF,
Nationally Certified Riding Instructor
West Bethesda, MD USA