Be VEWY VEWY cawefuwl .....
The surface of Plexiglas will withstand some pretty harsh solvents, but the edge will not ( search the posts for some horror stories on this).
Krylon is indeed great at sticking to plastic, because it EATS into the surface.
The FUSION line for plastic is modified somehow, but the MSDS shows all the same hot solvents, and then some!
http://www.paintdocs.com/webmsds/web...C=724504023371
You might try sealing the edge first with a good acrylic-based resin paint , like artists Liquitex, then you can topcoat with almost anything.
In any case, test first, paint later. ( $700 canopy?)
Have you considered applying vinyl 'decal' material to the areas you want to paint? Colour match may be an issue, just a thought. There are old posts on this also.