The seatbelt mount area on this side had some nasty pitting / small holes:

So the mount came out for blasting and priming, and Barry hammer-formed the replacement section of panel:

You may be thinking - but where does the mount go?
If you put it back in the wrong place, the interior trim will need to be hacked about.

Luckily Barry has thought of this. Did you notice the two small holes in the remaining section of good metal? Here's what they are for: