Repainting has commenced, will hopefully be able to post photos when I'm done with that part.
There's no indication of watts or hp on the motor, and the heating plate is so rusted I can't see anything to indicate what current it draws. However, the switches are both marked 3 amp, so I'm going to take it that 3 amps is the max current they can allow through to either the heating plate and motor. I'm hoping that's a safe assumption!
I'm posting one of promised brush photos to see if I can make it work this time... Seems to work when turned to landscape, but not portrait orientation... Odd!
One question on the bushes - the contact ends are slightly concave - were they likely designed this way, or is that from wear? If so, is it worth turning them through 90 degrees to even the wear?
Need to source a new bulb and cover now. The old fitting is cross-threaded in, so I'm having a tough time getting it out. Plus all my tools are metric, and everything on this is imperial!
Thanks again to everyone who's commented - it's really been a great help!