Y'alls must bruise easy.
I've been paintballing many times, usually wearing jeans and a hoody, and I think I only once got a welt, from being hit on the bare hand.
Honestly though, it always sounds way more fun than it actually is. The lack of accuracy, and the ability to just spam paint ($$) mean you can't really pull of sick, well aimed shots...and running while exposed to fire will just get you killed.
If I ever go play again, I think I'd rather buy a bunch of...