here's another trick.. depending how much paint you got on it..
use a cuticle stick( hard wood nail stick with a point on one end, and a chisel point on the other)
also a hardwood toothpick can work,,
use the point, or chisel end to scrape the paint off,( like your erasing with a pencil eraser) if the canopy is not a soft material, it works good. The hardwood will usually scrape the paint off and not leave a mark, make sure the stick is clean.. If it does mark it, you can buff it out and Future it..
This works good for cleaning up the lines around the edges of the framing, just trace the frame edges and you get nice crisp edges with little to no marks,, and a light buff or dab of Future hides any blemishes..
I hand paint my canopy frames most of the time, clean the edges with the cuticle stick,, and done.. lot less time than masking...