i know this may sound gross, but i have this wonderful collection of old school 70's t shirts, and sometimes when i find them at thrift stores, they are pitty. very pitty. some of them are way cute, and i was wondering if there's some way to remove the stains, so i could save these t's. any suggestions? i tried bleach, but it wrecks anything colored or delicate, i'm looking for something a bit less caustic. thanks!

Actually there is a way to remove sweat stains (i'm assuming this is what you mean by pit stains) without bleach. I also am a thrifter and i know that the clothes i wear have been worn by others and therefore carry with them old sweat etc but when you can see the stains its kinda gross - anyways - vinegar!!! that's the way i try to soak just the stained area if possible in straight vinegar for a few hours - usually overnight - and then i just wash and voila no stains! now i'm not sure about how this works on all material and maybe you don't need to soak for that long but I just stick in the material and forget about it for while .. also it might be best to dilute the vinegar though I never have...

it also helps to hang them in the sun by the bottom part so the arm pits are very visible to sun.
sun works great on my karate gi...it's never yellow or grungy looking.