Been plodding on with this slowly. Helper springs arrived from Gaz, so bought some SKF wheel bearings and some new hubs ready to build the struts up. Just need a free Friday afternoon to press the bearings in at work now.
Pulled the rear axle off ready to fit a G40 item with Mk2 Golf rear discs hanging off it. The rear shock bolts were seized to the shock bushes, so ended up cutting the bolts off. Will drill the remnants out at some point as the shockers are still serviceable.
Progress got stalled as I noticed a few scabby bits underneath which really needed attention. I think being in and out of a paint oven a couple of times probably exacerbated things where the stonechip/underseal's going baggy.
Anyway, I've hit the lot with a wire brush and Vactaned it. No pictures of it as it stands now, after each session my eyes were full of underseal and rust, so didn't really feel like taking pics! Next job is to seam seal and/or stonechip the appropriate parts.
Removed the rear axle brackets and the fuel pump assembly carrier. After 20+ years and a spate living by the sea before my ownership, these bits looked like they'd been down the bottom of the sea. They got shipped off for blasting and powder coating.
After:
The fuel pump carrier looks fairly pitted still, but given that it's £75ish for a new one and special order from VW Classic Parts it'll do as is!
Need to get my finger out to get the arse end back together and throw brakes and suspension back on. Then it's easy street and engine refresh time.