After sand-blasting with fine grit and low pressure, I had all parts of my 1942 M20(including spokes and nipples !) powder-coated with dull RAL6014 as a primer, and put on a final layer of 1944 army green with a rattle can. Scratches and other superficial damage will not penetrate the hard powder coating. Not something for the rivet counters and purists, but now I have a reasonable chance the bike will survive another 70 years...:relieved:
