Paper wheels vs belt sander

Probably not the answer you're looking for, but I use both. I profile with the belt sander and finish with the paper wheel and rouge. Usually I only do this with my large choppers for time savings.

 

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The paper wheels are more forgiving than the belt. I only use them for fine tuning edges and angles. The belt will re-profile blades pretty quickly but you half to be careful. It takes about 10 minutes to sharpen and tune with a belt and paper wheels, about an hour if you do it with hand tools. I've been using motorized equip. to sharpen a vast majority of my knives for 40 +yrs. Once you get it it's very simple, but always unforgiving of mistakes.