I got my acrylic paint at Wal-Mart. I didn't like the color of the freshener so I painted it first an let it dry then brushed on the FO. The paint did not seem to bother the absorbition rate at all. I have also done them without painting them. So if you don't like the color or would like to sell different colors of the fresheners you should be able too without any problems. HTH, Chauna P.S. Feel free to PM me if you have any other questions.