It's cool, but just buy a (better) helmet and have it custom painted. I suppose you could do vinyl, too. You'll probably save money, have a better helmet, and have something custom.
I'm going to have my Shoei done in BMW and ///M livery.
'13 Individual Frozen Brilliant White ///M3 Coupe
Ordered 2/15/12 | Euro Delivery on 9/21/12 | U.S. Redelivery on 12/6/12 | Motor Dead on 7/15/13
'13 Space Gray/Mugello Red X5///M
Pavement Punisher | Snow Muncher | Family and Board Hauler | Roadtripper