Gents, There is a dearth of skilled cobblers in my city. As such, appreciate your inputs on how to best remove/mask the discoloration on the toes of these Fratelli Rossettis. Discoloration is not from polish - have always used neutral shoe polish. Appears to be a combination of dirt+scuffing. Picked up at Serravalle outlet two years ago, but worn sparingly. Current care regimen is Collonil Premium Diamant shoe cream. Previously used Collonil Rustical....