Water stains on pol. Alu

Hello all The Dyna FXD (2003) doesn’t have chromed, but polished aluminum parts. Now there have been some water drops “eating” now. Can you tell me with what kind of medium I can polish them away again. Of course, it would be great if I didn’t have to polish the whole primary lid because of 2-3 drops. A certain treatment would be desirable. Is there anything from S100? Gruss FXSTB