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I have read people coat blades in RenWax, which should end up clear. TufGlide also seems like a good option.

Something to think about is you can always start without a clear coat and add one at...

I would think you could totally seal the scales in RenWax. If you let some neatsfoot oil soak in before sealing them, they should stay nice and hydrated. I would imagine you could seal the blade...