What I did was polish a bevel on a MAAS, pasted a piece of sailcloth. But you could just paste a piece of cardboard. 50-100 laps will remove all the stria on the bevel, then strop on your cleaned hose, in my case it was seat belt. If you see scratches on the polished bevel, there is still grit on the strop.

Once it gets in to the fabric & weave, I don’t think you can ever, get it all out, but give it a try…