I always use Tamiya paint, and thin it 1:1 with isopropyl alcohol. Thinned that way, it flows & sprays really easy, the only problem is you need LOTS of light coats. Not sure how well it would work on a canopy, I like the tinted Future idea...

When you dip in the future run a paper towel around the edges to wick excess Future away. Be careful not to touch the the glass os the canopy.