Depend on the desired outcome.
If you just want to get rid of the wheel well do as Mike suggests and hack away at the part with mini-power tools, finessing the finsh until you can fit any replacement.
If you want to transplant the part and need to keep the fuselage the scribing method, whilst laborious, is best.
If you want to transplant the part and are not worred about the fuselage then hack around the part with said power tools, modelling knife or saw, leavng a margin that can be removed & finnessed once the part is free and more managable.