I am shocking at welding, but you've got to start somewhere!
I had a rotten seat mount so cut it out, had a cut of floor that I got from another member (cheers Marshy!) - I cut that to size and butchered it with a welder. It stuck together pretty good and cleaned up OK, I'd rather have a pretty ropey looking bit of solid metal than a pretty rotten looking seat mount any day!
It had obviously had crap sat inside it for years and rotted through, a shame as it's the only actual rotten bit of the bus!
I didn't realise quite how quickly you go through cutting discs, maybe I was being a bit rough...
There were a couple of tiny holes I'd missed so when I went over it with a flap disc I filled them in and ground them down again.
It didn't end up entirely flush, I wasn't too upset as I will be laying the floor over the top, so the important bit was that it is solid and watertight!
It was my first attempt at welding any kind of bodywork, I've only ever tacked stuff together and put big blobs on thick steel before, it was infuriating how easy it was to blow through, I think I ended up with the power backed off a little too much and the penetration wasn't great in spots, but I was fairly pleased with the results after I'd got most of the way round!
Put some red etch primer on it and let that dry, then stuck some satin black over it.
I'll probably take the interior out next winter and take it into the unit and strip the floor completely back to bare metal and do a proper factory white job on it, but to make it usable this year I left it black.
Finally cut some silver bubble insulation (thermawrap, £20 ish from screwfix and enough to do the cargo floor and cab floor. 2 rolls would probably do the whole van, it's not a perfect solution on it's own but will be an improvement over ply straight onto the metal floor!) for the floor and put the ply in ready to be screwed down, I'll do that later this week.
Next is fitting vinyl floor and fitting the bed! Also my Mrs was due 2 days ago so kind of waiting for that to happen too!