are the wheels really ceramic or are the brakes ceramic?
autoglym, griots, 3d, p21s, sonax, ardex all work well. there are many others out there as well. if you could tell us more about what your looking for the selection could be narrowed a little.
are the wheels maintained regularly?
what finish is on the wheels (polished, clear coated, anodized)?
do you want otc type cleaners or are you willing to order?