Re: How tough is window & door spray foam?
Shouldn't be too bad. Use a keyhole saw with a sawzall blade in it to cut the foam, or a drywall keyhole saw. Ride the framing, not the door jamb and you won't do any damage to the door. Cut the nails and pull them through the jamb and out the back side, this will prevent damaging the face of the jambs. Go slow and gentle with side cutters and a paint stick to protect the back of the jamb and minimize tear-out.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!