Idk if you still get on this forum, but I agree, my nails seem to grow twice as fast after doing a few days of pottery. Unfortunately, I can't do it as often as I'd like or used to. I'm 32, but have pretty severe arthritis and other connective tissue problems. But, sometimes I just suck it up the best I can because I just want to be able to enjoy making something. Usually has to be pretty small or at least simple pieces because if I start hurting from doing it for the few days after, it's tough to get it completed the way I want. Obviously, that's not every time and usually I'm pretty good at preparing like I WILL be hurting by spray it down and covering it. Sorry for blabbing on, just saw your comment and have the same thing, nails just grow like crazy!