Finally, removed rear wheel ready for tyre change and UJ greasing etc. There's a patch of corrosion under the swing-arm forward box section, but it's pretty localised and difficult to see, so will apply some satin paint after treating the rust, rather than a full swing-arm out and powdercoat job. Same with the front subframe, that's just flaked a very small amount on the edges of the fastener bosses. The red paint on my old greenie frame fell off like leaves in Autumn, this seems much better.
Wheel and rear diff bearings and splines all look ok, will obviously grease the non-sealed ones along with the UJs.