Found a nice bathrobe my neighbor had discarded; in good shape, except there were a few small splotches of white paint on it.
Took it in, glopped some of my paint remover (3M Safest Stripper) on the spots, let them sit 10-15 min., scrubbed them with an old toothbrush under running water. Threw robe into the washer.
It came out fine. No discoloration or any other visible damage.
So maybe you don't have to throw out that nice shirt of yours you were wearing when you thought you'd just touch up that paint job without bothering to put on your work clothes.