using tippex could get messy but you may find that there is a thing called 'white glaze' which is perfect for what you want to do you can fine it in like specialist hardware stores.
Find them going on here sometimes. I did put an add in classifieds few weeks ago and had nothing back.Seems like they are quite hard to get hold of.
Might be better off getting the 06 grips with the silver badge.
Nige