just get a hair dryer and heat the leon letters and then you'll be able to get them off. Some 'sticky stuff remover' will get the rest of the residue off.
I've vinyl wrapped my badges and letters previously but then plasti dipped them last week! So theres a few options! Both vinyl wrap and plasti dip allow for them to be put back to chrome very easily, if you paint them you'll have to replace the letters.