I just got a leather strop for the first time in my sharpening journey and what a difference!
I sharpened all the straight edge knives at my in-laws before Thanksgiving Day and finished them with the strop and compound. Unreal!
I’ll post links to what I used if it’s allowed.
They are a game changer for adding that extra ‘umph’.
I use an older version of this sharpener to restore a sharp edge and then hit the blade with a strop.
I got this strop that came with the compound. I used a tiny bit of olive oil on the leather and spread it evenly with my fingers.
I mostly use the rough leather side with compound to really finish the sharpening and then polish with the smooth side with no compound for the final polish.
Also, I can do serrated knives with the sharpener, but I read that you should never strop a serrated blade.