US 101 mags

i have new 101s from summit racing, beautiful finish, soon as water hit them they stained, even the slightest contact with anything leaves a mark. tried mothers mag polish, didnt touch the water stain. any tips on how to fix this, or are they just cheap wheels?
That’s really strange because I’ve had the same wheels on my car for about a year and it’s been sitting in the yard getting rained on the whole time and they still look new. Did you use a rag and just wipe on and wipe off or did you use a buffer? Aluminum likes really soft materials (with polishing compound) moving really fast.