Farbton 76 looks nice, my friend @airbum!
I also frequently hear those nasty "cracks" upon handling a model, wishing it will be some phantom inner seam that just cracked, without further complications...
Understandably, that rarely is the case...
Well, there's nothing that cannot be repaired, and i can see your mishap was relatively easy to remedy.
As for the masking material that our friend John @johnb mentioned, it is Uhu Patafix. This material was known as Blue Tac back in 1990 or so, that's why some strange guys (yours truly included) call it "tac" sometimes. John used this material to his Defiant, so, he is aware of it!
By the way, it's this one, possibly/probably it being the same in Denmark and Holland!
Your 109 looks amazing!
As for your next projects, the only thing we are sure of, is the fact that you are going to amaze us, as usual, with your subject choice(s) and execution!