Have focused my collecting on Ducks I have seen a lot of cell rot in different stages including after restore. I have noticed that a razor in cell scales will look fine and shiny for a long time. What you may not notice without looking real close is little black specs on the blade. I let one go for awhile and when I tired to polish the specs off with Blue magic and/or Mass and it didn't come off, the scales got replaced. And Richard is very correct on the wedges. I have seen them do damage when the scales are fine.
Best environment for celluloid is dry and cool. Keep them out of the sun or else. Put a razor with cell scales on a window sill in the sun and you will be crying in less than a week.
Nice experiment, my best advice is use them so you can keep an eye on them or make sure you keep an eye on them often when in storage. If you can't do that, change the scales out. All original is nice but not if it self destructs.