I got rid of my chicken strips today. With a grinder. And an 80 grit disc. My rear tire was starting to feel edgey from the flat spot in the center after 10,000 miles of highway commuting so I thought about grinding it round again. My coworker who is an expert body and frame tech and also a winning stock car- dirt oval driver was walking by so I asked him half jokingly if he ever ground rubber off of a tire before and he said "Only if you want to win!". It turns out that these guys buff up the tires between every heat to take the glaze off. So I borrowed his grinder and went at it with the wheel idling on the stand in first gear. No more than 15 minutes later I had a dust pan full of rubber and a nice round tire again. . . . . . . . . .