So now I'm wondering: how often 'should' one strop? Before each shave or something (un)like that, or only after honing? Likewise for honing: How often / when should one do that?
One particular reason I'm asking is that I seem to have (prematurly) hit a plateau i my shaving result, I still have to finish off with a disposable blade and of course that can not be tolerated! ;-) (and I think maybe grandpa's blade is not as sharp as it was when he last used it)

I'll answer one how often question myself: I shave once a day, each day.