Restoring my old Chevy , owned it since 1971 and got started on rebuilding all the sheet metal, had some cracks in some doors, replaced both inner and outer rockers one partial floor pan and rear quarters to build from donor cars. Here are some pics. Rear quaters were both replaced in steel, used original donor sheet metal. found some rust free inner fenders and some outer fenders and parts from other cars. The bottom rear quarters have the bumper insets shaved and removed. The top of a 51 chevy car rear quarter is the same contour and will fit in if you properly section out the old bottom.
The right quarter has pieces from 4 cars in it.
The top edge of each door above the glass had 18 trim holes in each door, These were tig welded up ground down and finished.
Each door had the deluxe trim molding on it and had several holes to be welded up and finished smooth.
Been using the 200dx on the door cracks and the mig on the rest of the sheet metal.
The Supercut 50P helps in cutting out odd shapes.