I want to clean some baked-on motor oil which is on a nickel plated bike
frame.  The oil drip (English parallel twin, of course) was in a spot where the
exhaust header is routed tight to the frame and so the oil has been well
roasted.  I hesitate to use a scouring cleanser or oven cleaner for fear of damaging
the nickel.  Does anyone have any suggestions?

Thanks one and all,

George