Looking to get a second spinner and two sets of caps. Need help, please.

I get if this needs to go in the weekly thread but I feel this request is a bit different.

Short back story, I've already picked up a brass spinner with brass caps which I adore but it's not super fidget worthy. I've had it for about two months now and here in is the problem.

I'm one of those people with corrosive or acidic sweat that loves to stain or literally eat through most metals. My laptop of 3 years has lovely depressions in it from my palms and half the keys lack letters anymore. So what metals should I look for in a spinner (not a big fan of lightweight stuff) and caps? My brass one is already turning black or greenish from the spaces where my fingers rest.

I know I cannot sweat through rock compounds but I cannot find any caps that have such things. Any tips from anyone out there?

Thanks in advance!