so easy off brand heavy duty oven cleaner works. one wheel I had already sanded on a bit and one was not. sprayed both and the one that had been sanded the coating came 99% off. the unsanded wheel got really clean but no coating was removed. I scuffed it with a red 3m scotch brite pad and sprayed it again, and about 95% of the coating came off. I let it sit for maybe 20 minutes before scrubbing the dried oven cleaner off the wheels. I recommend anyone trying to do this to get some chemical gloves (handy to have around anyways) and use a scrubby sponge to clean off the oven cleaner. it doesnt just rinse off, it needs to be scrubbed