To remove nail polish from suede, try either dry cleaner fluid or nail polish remover. Be sure to try the product on a non-visible area first, to make sure that it does not cause the color to run in the fabric. Try to use the most mild nail polish remover possible. Work from the outside of the stain toward the center so as not to spread the stain. Let the treated area dry, then buff with a soft cloth to restore the nap.