If the machine really needs to be painted to be usable, that is one thing. I guess my thought is to take a good machine and repaint it just to have one in another color is not in the best interest. Repairing and restoring is a different story all together. I'm glad that you can help others make their machines and furniture usable.
In a like story, I try to grow orchids, and just hate to see the ones in the stores that have had dye put in the pots and absorbed all through the plant just to make the blossoms BLUE!! I complain when I see them!