Now, if I was a much more accomplished mechanic, maybe I could have disassembled the forks and put the fork bottoms in a lathe, but to tell you the truth, I couldn't work out how to loosen the damn things. I guess they are pressed into place? Or maybe there is a bolt holding them on inside the fork sliders?
The final step was to restore the matt painted finish (picture 4). I went for a special brake calliper paint that is supposed to withstand brake fluid, which can wreak havoc on standard paint. It came in a spray can, and despite the salesman’s repeated guarantee to the contrary, turned out as glossy as a grand piano. I let the paint harden and then took the shine off with a scotch brite cloth. Result.