I used Rustoleum chrome spray and it came out really nicely,
I however made a mistake though, always polish up the paintwork after it has dried and this did not take kindly to that, it lost some of its shine and Unfortunately I ran out of the paint so I will need to redo it again.
You probably need to use a very high grit on the silver paint. 2k or 3k perhaps. And sand it wet. Also, I believe to really get the chrome look, you're meant to clear coat it. Probably a high gloss poly or maybe lacquer.
I forgot to add, I kept the switch on on the handle that had been fitted by the previous owner. Although not original I did think it looked cool and added some personal history to the machine.. and it worked which the original one did not, I have two of these and know of another 5 ? Still in use by their owners regularly, not one has the original switch anymore.