I've got a hole I need to patch close to the bottom flange of my outer sill where it meets the inner sill. Normally I would strip the interior on that side but time is in short supply and I'm working outside in the dark so I'm wondering whether it's strictly necessary to remove the seats and lift the carpet. Do mobile vehicle welders always strip the interior to do small patching jobs on outer sills? Anyone got any experience or advice? Thanks in advance.