The master cylinder had leaked and the cylinder and the right hand controls were pretty crusty so I've been cleaning and rebuilding the switches.
This is what it looked like inside.
After much cleaning and lubing it's not going to win any beauty contests but it is functional and everything operates smoothly.
A quick scuff, prime and a couple coats of satin black and at least it's presentable.
I still need to fill in a couple of the recessed areas that used to have red paint and get some new stickers and it will be good to go.
The original loom was super stiff and brittle and no way was it possible to reinsert it into the handlebars so I got some heat shrink tubing from McMaster and put that over the wires, it will be a while before I'm ready to reinstall the switches but hoping it won't be too bad getting the wires back in the bars.
The left hand switches were in pretty good shape so they only needed a clean, lube and shrink tube and they now operate smoothly and are ready to reinstall as well.