The offside rear door Id bought second hand looked really good but on closer inspection there were some tiny rust spots in the corners showing through the coating applied by SPL. I’d already sorted the door gap so this was a problem I should have spotted sooner. Off with the door and after poking around with a screwdriver it was an even bigger problem needing a repair panel. The lower door skin curves top to bottom and includes the curve to match up with the sill. You can buy a repair panel but with my benchtop English Wheel and bead roller and tipping die for the flange I was able to make one (2 days work!). Of course when fitted back on the car the door gap was wrong again which meant re-leading the sill line.
