hello from illinois

well i picked up the duster tonight guys!!! subs are good, trunk needs patched rear quarter need either replaced or patched as well as rockers. floorpans are well i can put a foot through lol il probably end up just getting sheet steel for the floor pans and making something work. but an area of concern for me is under the hood on the right side idk if you would call it the inner fender wall but it is rust not through but thin. how do i go about this one. can i just get sheet steel since its just like a box there and weld on top of the other crap or what?