The Rear Rollers on those early units were painted in a light grey as you've suggested.
Unfortunately regardless of whatever paint you use will see it worn off the high ridges of the surface instantly unless you can have the machine only roll on grass and have it on a platform to move it around on hard surfaces, but in saying that no one does that for very long until they discard that method and just put up with a scuffed roller.
Any enamel will do for the above mentioned job. They were never painted with any level of extreme surface finishing as they are simply cast iron and the paint was merely used to stop the rust developing on the roller thus retaining good presentation for some time. In saying that I strongly feel some Scotty's never received that treatment as I've seen quite a lot of evidence that discredits the painting of rollers theory.
Now as far as plating the handle bar assembly is concerned, $120 seems just way too cheap and as such one must ask the question, is this merely stripping the old chrome and simply re-plating ? and is there any polishing of the bare steel to take place prior plating ?
The process to obtain a superb result is as follows,
1 Strip the old chrome 2 De-rust the steel (Pickle Bath) 3 Polish the steel work (time consuming manual process) 4 Degrease and run through the cleaner bath 5 Copper plate 6 Nickel Plate 7 Chrome plate
I strongly feel that at the price quoted it will be just be done without any polishing work whatsoever.
I guess one must ask the question or a undesirable result may be the result.
Cheers, BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.