Since you invited us to shoot down your idea...

In general, a slurry on a hone makes it cut faster and, at least in some instances, effectively makes the hone cut as if it has a more coarse grit. I'm not certain if this is true with a Swaty, as I have never tried to hone it with slurry, but if it does hold true like other hones with slurry, then you would not want a slurry because it would reduce the ability of the hone to polish. You can use the Swaty as a finishing/polishing hone after the 8k but I can't imagine any benefit to making it cut more coarsely than it does with normal use.