Just a note about Wildcat jewelry, since a recent post sparked my thoughts:
About half a year ago, I decided to stretch my frenum from 10 to 8 gauge. It had been 7 months since the piercing, I used plenty of water-based lube, took it very slowly and gently, etc. It was fine for a few days, then after day 2 or 3, it went through a VIOLENT rejection in less than a week that left me with more scar tissue than I'd like. I'm getting my frenum redone, and wondered why the old one rejected. Then, the Wildcat BB in my appy started getting some extra unusual crust around it, which I NEVER had with other barbells, and it dawned on me: a metal reaction probably spurred the rejection. Now that I look back, I remember the skin was red and puffy, looked and felt very tight around the entire area, and had an almost wet appearance, which is mostly what the tribe guide describes for a metal reaction. And considering that Wildcat's steel isn't implant grade as far as I know, and has reacted negatively with my other piercings, it makes a bit more sense.
I've always endorsed Wildcat and it's still nice for temp stuff, but I've really realized that you get what you pay for. With the prices I've seen Anatometal stuff go for recently, it's not that hard to suck it up and go with the good stuff right away.