Not a war bird but...

I have a 20+ year old Calypso pattern plane that I attached the canopy to the Monokoted fuselage with a small bead of RTV. Still holding strong. Added some 1/4" trim tape for a simulated frame and to cover the RTV joint showing through the clear/tinted canopy. Used tape to hold it in place while the RTV cured. It isn't a smooth, faired in attachmnet but from 6 feet away it's hard to see the difference (.030") between the canopy and the fuselage.

Terry in LP