Cowl repair

I'm a little late on getting these pics up but it will illustrate what my situation is and may give you some insight on yours. My plan at this point is to have the lower cowl lightly blasted. Once done I'll be welding the sections together and adding some new sheet metal in the thin areas and then once the lower section is welded back on the car I'll be rolling it with bed liner. My thinking on this is it wont be seen and if done with proper prep will never be an issue on this car again! I'm still unsure about the upper section. I've got a few sections to work with but its going to be a handful I think. This is by and far the worst part of this car as good pieces are few and far between!
Joe