Hi
Andrew, I just had a look through your build and well done on your first try... AB and all.
Practise on the canopy and approach it the next time like you have done with the camo masking. The peeling you're experiencing is because of the nature of acrylics as they dry like a rubbery skin. To combat that I either immediately remove the masking after spraying or run a sharp blade over the edges of the mask when paint is cured before removing the mask. Don't lift it but fold as you pull like you do with a large carpet. This action avoids lifting the paint from the frames.
The other trick is not to have too heavy a coat of paint on canopies and to avoid the transparent look of the frames is to apply 3 thin coats of paint...black, primer and top coat.
Have you tried dipping the clear canopies in Future before painting? It helps clear scratches or blemishes.
Also I won't worry about the MGs as if I can recall they were fitted staggered because of the breech and magazine mounts.
Good bit of scratchery on the exhaust and as
Ralph has said I admire your tenacity to stick with it and correct failures.
Cheers,
Richard