You should be able to. Basic, solid PUL is just polyester knit fabric, so if the paint says it's ok to use on poly, then it should work fine. You usually have to let the paint set for 24 hrs before washing and I'd recommend applying with a brush and using thin layers because thicker parts might flake off with heavy washing. It'd probably be best to paint on covers since they don't have to washed as often as AIO's.