Not sure if this has been covered (i did quite a few searches and got nada), and its most probably common knowledge to most, but after my new reebok classic bobby dazzlers got the dirty black smudge mark from the rubber gear selector sheath, something had to be done.
Tapes no good, comes off with repeated gear changes.
the answer...... Clear heat shrink tube.
Non marking, wear resistant, zero visual impact and self moulding. Simple
Worried about wearing through the sides? No probs, it can be double bagged (just like when in Thailand...)
Anyway, just thought id share my small epiphany with ya'll, and if just one pair of kicks get saved, well, i think, it'll have been worth it...