Just wondering what cleaning products you guys use. Whilst I've got all the bodywork off being sprayed, I thought I may as well give what's left of the bike a damn good clean. I currently use muc-off stuff, and have found it to be fairly good, but it did leave marks on the black frame of my Speed Four, which were a pain to get shifted. What do you lot use on your paintwork, your engine and your frame? And any particular method?