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I see your point. But again, in the past barbers didn't (usually) have a bevel setter and a stone in between that bevel setter and the finisher. Slurry was used indeed, but it would take a long time...

It's not a really serious matter.
What I'm saying is, if you use tape, you can be 100% sure that the edge will come in contact with the leather, if you know the basics on stropping.
If you won't...

If your razor was honed with tape, then you'll have to tape it. In fact that's a reason paddle strops are not as popular as the... classic ones. The leather/linen/wood or whatever is below the edge...

Talking about tapes, I would like to confirm something; isn't it reasonable to assume that all tapes we use for honing don't have the same thickness? Let alone finishing with more than one layer,...

Short answer; really difficult/no in most cases.

If the razor is new, with an untouched rounded spine and the edge is beautifully sharp, then tape was used. Or if there is a difference between...