Does Restoration Lead to Value Loss?

I am about to restore an old Philco 610 tombstone inside and out.

Will this cause the radio to lose its value? I am planning on refinishing the cabinet and recapping the chasis. I would not display it in its current state due to scuff marks and chipping paint.

Please help as I do not want to ruin a valuable piece of history.
Thanks!!!

I'm more of a wind-up gramophone collector, but I should imagine the same rules apply with radio's, as it does with any antiques. That is "Don't refinish the cabinet unless you have to". It won't decrease value by restoring the works, but always try and use original style parts, valves etc. It's not much use having some of the original components, especially when there could be a risk of fire. Those waxed paper ?capasitors? and rubber coated wiring can be a danger, but keep as much original as is possible and safe.
Cabinets are a whole different ball game. Depending what was used to finish the cabinet, they can sometimes be restored with a bit of elbow grease. Shellac & some laquer finishes respond well to a clean, wax & polish. A lot of Phono guy's use Gojo (in the US) or some other brand of hand cleaning cream, available at auto stores. You have to get the one that DOES NOT contain pumice. They rub this into the finish with their hand, and remove it with fresh paper hand towels each wipe.When its all clean, give it a coat of bees wax. Its a long process, but I've seen some truly amazing results doing it this way, and well worth the effort. There's also another product in the US called "Restore-a-finish" which I've heard can have great results as well.
Unfortunately, at least here in Australia, most early radio's were finished with cellulose based laquer, which tends to craze and flake off in patches. As far as I know, theres not much you can do to restore this type of finish, but If it's not that bad, I'd leave it. Otherwise, you'll just have to strip & repolish. If possible, find out what the original finish is, and use the same to refinish it. Theres nothing worse than a nice gramophone or radio, thats been "restored" with some modern plastic polyurathane finish. No matter how well the finish is applied, it will alway look wrong. Using shellac on a cabinet that was laquered, can result in a very orange finish that will look wrong, and visa-versa.