Quarmyre - I generally use an automotive grade medium tack masking tape cut into thin strips, sometimes I will also use a liquid making solution with it. When I have large greenhouses to do and can find Black Magic sets for them I will go that way. For this one the bomb sight window detail was so soft on the nose that I used a piece of Bare Matal Foil to mask that area then continued with masking tape.
Nmayhew - yes, saw it - thank you very much.
Kik36 - yes but my boss may have a comment on that
KJ200 - you remember that movie "The Girl, The Gold Watch and Everything"?
Everyone else - thanks - you guys keep me motivated.