MutationXv2 MOD, button polish

[wc.saintnick]

So my MX mod switch has this ring in the middle from my finger, no it's not dirt, grime, patina, it looks like finger oils (resembles the ring around the moon in the clouds if anyone knows what I'm talking about) but I've used cleaner, polish, dremel, microfiber, even a 4side emery board, won't come off. if anybody knows a way for me to post a picture here or show you I would be much obliged. But if anyone has any ideas right off the bat it's not a big deal its just personal preference