I don't think it's possible. The photofinish is just an ink (paint) pattern on a decal, paper, or celluloid substrate, so whatever you use to strip off the outer paint will probably remove or disfigure the woodgrain design, too. Some plastic-compatible strippers are now available, but I suspect that they would not work any better than MEK when it comes to protecting photofinishes.
The old photofinishes had low durability and tended to peel or flake off, and were very susceptible to sustaining ugly damage (more so than real veneer) from scrapes and gouges. So, the reason it was probably painted in the first place was to cover the deteriorated condition of the photofinish.
If it were me, I think that I would just strip the thing, make whatever surface repairs were needed, then bond paper-backed genuine wood veneer to the set where the photofinish originally was applied. You can obtain this sort of veneer at some big-box home-improvement stores, but it is also available via various eBay vendors in interesting grain patterns. I bond it using 3M "77" spray contact adhesive and use a hard-rubber laminate-surface roller after applying it to ensure that it lies flat.
: Has anyone come up with a method to remove paint from sets without destroying the photo-finish?
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:I don't think it's possible. The photofinish is just an ink (paint) pattern on a decal, paper, or celluloid substrate, so whatever you use to strip off the outer paint will probably remove or disfigure the woodgrain design, too. Some plastic-compatible strippers are now available, but I suspect that they would not work any better than MEK when it comes to protecting photofinishes.
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:The old photofinishes had low durability and tended to peel or flake off, and were very susceptible to sustaining ugly damage (more so than real veneer) from scrapes and gouges. So, the reason it was probably painted in the first place was to cover the deteriorated condition of the photofinish.
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:If it were me, I think that I would just strip the thing, make whatever surface repairs were needed, then bond paper-backed genuine wood veneer to the set where the photofinish originally was applied. You can obtain this sort of veneer at some big-box home-improvement stores, but it is also available via various eBay vendors in interesting grain patterns. I bond it using 3M "77" spray contact adhesive and use a hard-rubber laminate-surface roller after applying it to ensure that it lies flat.
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Yes, I would try to blister the paint so it lets go of the original lacquer finish. With luck, that paint will be an inferior product maybe even water-based and you could be surprised to find it peeling off. I would use plastic scrapers and go reallly slow.
http://www.radioatticarchives.com/features/schooley_photo-finish.htm