Polymark Paint

I have a few bottles of fabric paint flakes Polymark. They are a bit old and kind of thick. Is there some kind of liquid that I could use to make it thinner, but still make it stick and last on the cloth?

Slim either with water or with "textile medium" if you have it (that's what makes regular acrylic paint in acrylic fabric paint). Neither should affect the stickability, I do not think ... I suppose the middle of textiles would still intact, that gives acrylic paint a little more flexibility.
(If the acrylic has dried, it can not be diluted if.)

With a little fabric paint, make sure the item is pre-washed to remove any size (and do not use fabric softener), make sure the paint goes * in * the fabric, or wash not the issue for at least a week for the longest lasting paint.
(Thin lines of paint that are left are the sizes most likely to crack over time, but doing things above should allow them too.)


HTH

Diane B.