Thanks again, Guys!! Steve, the canopies were masked with Bare Metal Foil after the requisite Future bath. I use the "Chrome" BMF, as the other colors don't seem to be as thin and as "user-friendly". I've pretty much decided that for me, canopy masking is most successful when I use BMF, and so I always have a sheet on hand. A little pricy, but you can do several dozen projects with one sheet, so it all comes out in the wash, as they say.
The kit-supplied masks do not fit at all and could be discarded. The rear window doesn't fit properly, and if you look closely, you'll see that it's actually a bit "countersunken". The rear sliding section doesn't fit under the main glass at all, so I just left it off. Wasn't worth the hassle. The front sliding section doesn't fit either, without a lot of forcing, so it just sits where you see it. It's all about the angles in photography, I guess.