Try checking reranch.com, goods details there.
Much (in my mind) is to do with 'mojo','voodoo','nose turning' etc.
It was the paint available (new on block) that Gibson et. all started to use. Then like many things of the time (lead paint,asbestos,lead wiring) was found to be 'left wanting', hence poly finishes. Many will argue about tonal quality and repair, i.e. nitro sounds better though MUCH thinner, poly is more resiliant but stifles guitar.
I think it's abit like the ford/chevy fender/gibson argument, no-one is RIGHT.
If ya finish the wood right,sanding,filling (if needed) and apply enough coats, esp. lacquer, it will look GREAT, don't get hung up on the absolute choice of paint type.