Protecing Cycling Shoes

My Sidi's have a rather nice black mark on them where the white vernice has rubbed off after contact with something. Black on white, ace 
What can you stick on the front to protect that pristine whiteness?

What can you stick on the front to protect that pristine whiteness?
My blog: http://www.roubaixcycling.cc (kit reviews and other musings)
https://twitter.com/roubaixcc
Facebook? No. Just say no.
https://twitter.com/roubaixcc
Facebook? No. Just say no.
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Obviously this doesn't really help you a great deal :roll:
Summer beast; http://i497.photobucket.com/albums/rr34 ... uff015.jpg
http://www.wiggle.co.uk/p/Cycle/7/Sidi_ ... 360037973/