When your done hammering and dollying the bent over edge should be flat against the inner door frame. There are a lot of excellent new products on the market like panel adhesives etc. After the welding get out a wire brush and clean the edges where the metal was crimped over. Flip the door over so that the new door skin is accessible. Check closely to see if any minor metal damage resulted from hammering and dollying the crimped edge.
Same tool is used on the door handle.
Once you get the trim panel off the vent window assy. After the vent window assy. is removed the door glass is next. I don't remember if the cat whisker molding is held on with built in clips or screws, you will see either way when you get the door glass out. You' ll need a grinder with a 24 or 36 grit grinder disc. If you look all the way around the door edges you will see that the outer skin edge was bent around and hammered flat against the inner door edge.