The burr method was used and demonstrated by a guy that uses the name Slash McCoy on another forum (maybe this one too, not sure). You do passes on one side until you have a very mild but appreciable burr (or wire edge seen with a loupe) along the entire edge, then repeat on the other side. This is followed by alternating passes to even the whole thing out (maybe 20-50) until the blade easily shaves hair from arm or leg. It seems like a way to ensure that you are establishing a new bevel along the entire blade bilaterally. I saw him do it on a YouTube video. It has worked for me without issue so far.

So is there anything that I need to do to "reset" the edge prior to trying another finishing technique in order to know that the smoothness of the edge is a result of the "new" finishing method?

I guess another way of asking is:
Say I have a nice sharp edge using a set of Naniwas all the way up to 12K, but I just want to see what the edge would feel like on the face if it was finished on a Jnat. Would the edge need to be altered in any way prior to using the Jnat in order to be confident that the difference you are feeling on your face was because of the Jnat?