I had several white tank tops left from the last two summers as a lifeguard. They were sweat and sunblock stained, but I hate to waste things that can be reused or recycled. I tie-dyed them yesterday and as soon as I get some time I am going to sew the bottoms together. I'll have four bags that I can use at farmer's markets or for swimming.
Not bad for my first time trying to tie dye something.