[header] How to remove paint from a cat's fur [title] Remove their collar. [step] If their collar also has paint on it, remove it, and wash it separately. You can use oil to remove oil-based stains or wash it with dish soap to remove water-based paint. 
Let it dry completely before putting it back on your cat. If the paint has soaked through the cat's collar, particularly if it is an oil-based paint, you may want to simply throw the collar away.