Are you planning to make a sliding canopy? Thats really the only reason you would have to build a frame. If your planning to glue and screw the canopy in place as a whole, then theres no need. Then, you would just paint the frame thats embossed into the canopy. If you are actually going for the sliding canopy, which i must warn you, is alot more work that one would think, then theres a couple ways to go about it.