Tired of seeing those nasty letters you wanted to hide to begin with?
I see lots of trucks with the letters in... I actually wanted the off road Taco, but bought the sport cause of the blackwall's (one reason anyway)
Used this on the letters of my BFG AT's on a jeep I had... works great.. lasts about a year, but for 3 bucks, who cares
They used to have stuff called black magic awhile back... gone now, but this does the same thing for letters anyway
Marks-A-Lot® Jumbo Chisel Tip Permanent Marker
Waterproof, quick drying, nontoxic