Assuming my razor was honed with a single layer of tape from bevel set to finish, would it be possible to avoid using tape when doing future touch ups on the finisher?
Yes, it depends on the pressure that you balsa strop with. My balsa stopping, particularly on 0.1μm would not use enough pressure to work on a tape-prepared bevel, even if the tape was 0.01mm thick. It may work on 0.5μm and possibly even on 0.25μm but they do not prepare edges that I can comfortably shave with.In my experience balsa will have enough give. Tape is only a fraction of a mm thick, and the compression of balsa is sufficient to work. But YMMV, and there is no substitute for practical experience. It’s a cheap experiment to try out, so have a go.
Assuming my razor was honed with a single layer of tape from bevel set to finish, would it be possible to avoid using tape when doing future touch ups on the finisher?
I have tried the opposite - using one layer of 1 mil Kapton tape to finish a razor that was honed without tape - worked fine and the edge shaves great. There's only one way to know for sure - just don't do your experiments on your most valuable razors - get one or two lesser valuable razors.
Here is a youtube link supporting of the idea that you don't have to keep using tape.
His argument is that taped OR not, the edge was beaten back.
At between 5:30 he starts talking about tape.
to achieve the compression to make that work, requires more pressure than we normally use on the pasted balsa. I typically hold mine vertically, so that the entire weight of the razor cannot bear down on the balsa. It really makes a difference. So yeah, you can do it, but not at the reduced pressure that has become part of The Method. Results will probably still be "very good" but not insanely sharp.In my experience balsa will have enough give. Tape is only a fraction of a mm thick, and the compression of balsa is sufficient to work. But YMMV, and there is no substitute for practical experience. It’s a cheap experiment to try out, so have a go.