My house was built in 1947, with an original 1-car garage. I wanted to replace the side door with something more thermally insulated, and also something a little more secure. Problem is, to install a new door, looks like I'm going to have to get out the old sawz-all and cut the old jamb out, as well as enlarge the hole for the door by cutting the outside wall of the house. In the first photo, the jamb is highlighted in green. The second photo is a side view of the jamb and outside wall. Notice how the jamb is actually built behind the siding. This is why I'll have to cut the siding away to fit the new door. I am almost 99.9% sure the original paint on the jamb and the outside wall of the house are lead-based. What would be the best way to remove the jamb and cut the outside wall out without creating a major lead hazard?