The Rit die does work, I have done it several times. Use the dark shades of the basic color {dark blue, dark red, ect.} The hardest part is the water temp, it needs to be HOT. When you trim the canopy use the scraps for a test to make sure the heat won't distort it. Also do not let the canopy touch the bottom of the pot. Once its done nothing will hurt it, even if you scratch the canopy, and it remains crystal clear.