maxi-model said:
Provided what made the mark is on the surface and has not gone into the finish/colour coat might I suggest a little light rubbing with "T-Cut" auto paint restorer. It is a mild abrasive so test it on a hidden area first, keep it away from any surface Tampo printed decoration and go easy with the rubbing so you don't go through the paint finish. Works for me every time. Great for getting rid of "orange peel" paint finishes too and polishing up plastics.
Max.
my thought also-try it on the bottom first
even a super light abrasive can change the sheen-and this may show up as shiny in a semi matte area
the shoe cleaners are impregnated with silicon-it will sit on the top and appear shiny until it wears off or ohterwise disappates
also, with rubbing and certain mineral based compounds the ink may soften; sometimes the printing can smeer ever so slightly
a very very light cutting abrasive may be the thing,
with the above caveats
provided its on the surface-in looking, im not certain that it is
as the docs say-first do no harm-ive learned this the hard way-try an inconspicuous area