I've dealt with removing and treating rust (I used to own a Bugeye Sprite, a Morris Mini Cooper, and an Austin Mini, and there are no great rust collectors than those cars), and know there are lots of ways to remove it, treat it, hide it. However this DeRosa got me thinking that I don't know a good, cost-effective solution to the issue of losing a big chunk of chrome on a vintage bike:

On a car, the chromed pieces are virtually always separate from the painted pieces. Bikes are obviously different. I think the paint issues on this DeRosa are relatively minor, and the rusty spot on the inside of one chain stay could be treated and disguised pretty easily. That kind of 'patina' wouldn't bother me. But the rust on the fork crown is a big eyesore, and I imagine will still look pretty terrible after the rust is treated/removed. Clearcoat or touch up paint don't seem like solutions here.
It seems like such a small area to deal with rechroming, and I know it's getting harder and harder to even find places that do this kind of work. And would you also need to repaint after the chrome is redone? How do you deal with a situation like this on a bike you want as a keeper, but where the increased value wouldn't cover the costs of doing it right?