I've been grabbing an hour here and there over the past couple of weeks to keep things ticking over.
I cleaned up the area under the rear beam mount plate.
Most of it seemed solid, apart from the section where it has eaten through.
So that had to go.
It was pretty clean inside, but I gave it a coat of hydrate 80 for good measure.
It looked rough where the cross member meets the rails.
So I cut a section out to peek inside. It was scabby, but not rotten. Again, I gave it a coat of hydrate inside the frame section.
I then noticed this guy, who appeared to be hiding something....

That looks like it'll be a tricky repair

I'm conscious of getting too carried away removing material and getting myself overwhelmed, so I thought I aught to get some fresh steel in before going any further.
The Meg coming through as a van again, collecting some 18 gauge and doing a tip run
Cut a patch for the beam mount rail and gave the back side a coat of weld through primer.
I'm certainly no welder and it's been a while since I last picked up a torch so I was a bit nervous. I think it went ok for the first attempt. I'll improve throughout this, I'm sure.
I was having a few issues with the crappy regulator on my disposable bottle so I think I'm going to bite the bullet and take your guys advice and get a decent bottle and regulator setup before doing any more.
I'm not sure what to protect the fresh steel with though. Should I be priming it, or wait and do it all in one go?
Cheers guys.