I tried what you said on how to tint a canopy with rite dye and after 3 try and
3 canopy , I thought I would try something else, I got some plastic car paint that was a candy top coat and it works great. Just another way to tint a canopy. What I used was Patra R/C car Racing finish Candy Yellow RC 274
for polycarbonate car bodies. My guess is that some canopys are made from diffrent type of plastic.