I bought on ebay a silicone protective case for my car key.
It protects the key from wear and scratches... even protects it from water.
Only bad thing about it... it won't fit into the key slot in the dash but I always keep the key in my pockets...

here is a link:
http://www.ebay.ca/itm/Silicone-Remote- ... 84&vxp=mtr
