Hi Jeepney,
Thanks

! Hopefully I'll be able to post better pics of my plane after a week or so....
Yep, I used the 3M tape for the canopy. Currently, am doing a Academy B-24 D Liberator, and have masked off the nose areas and the cabin glass. The nose area was a real pain in the butt, with plenty of curved points, but it's done, and come out very well indeed!
My experiences so far:
1. When you have recessed windows in the canopy parts, the 3M tape works like a dream. I was able to mask off the B-24 nose canopy in about 3 hours of work

. Cutting out the tape in such cases is very easy; you just need to follow the pressed in lines on the tape. It may not work as well in canopies where there are no recessed lines to follow, or if there are no lines at all.
2. The 3M tape is better than masking tape, since I can easily see the lines beneath. Also, the thickness of the masking tape is so much, that even when you try and burnish down the window lines, you won't be able to see where the lines are, and you may end up cutting a line in the wrong area

! Also, the adhesion of the 3M tape is far less than the masking tape, and it comes off very easily!
Cheers,
BP.