ORIGINAL: Deadeye
Just use soap and water. I heat the water to 150 degrees, and some canopies take longer than others. I keep a sealed bucket full of the dye, and use a heating element and a turkey deep fry themometer to monitor temps. 2/3 bottle of black RIT and 1/3 bottle of denim blue gives this smoky look (in about 4 gallons of water)
Do find that it loses it's dyeing capabilities over time. How long can you have that stuff in a 5-gallon sealed paint bucket before it loses it's effectiveness? I have 4 canopies I'd like to tint would I at least get to reuse the dye over a snap of lets say 1 month? In the past, I used it once and down the drain it went [:@]