Hi everybody, I've in the past year rescued an 87 fxrs lowrider from a barn. It has been dormant for the past 10 years (well according to the plates). In it's extended stay in the barn the chrome and polished aluminum parts have become tarnished. Most of the chrome has cleaned up but the aluminum is being stubborn. It is very dark and I can't seem to get it to clean up. Any Ideas would be appreciated.