Mineral oil works fine for knifes but I think it is way too thick for a razor on a hard ark. Lapp count would be way up there because the razor isn't contacting the stone much.I reset the bevel and started all over with the Geneva Cutlery.
Shapton 1.5k - 5k - 8k - 12k - Translucent Ark Progression
I did about 150 laps on the Trans Ark, using mineral oil. I think I prefer the feel of the Black Ark over Trans... a bit more feedback from the stone.
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As for the shave, it started off similarly as all the other ones but it was sharp enough to cut through all the growth. It didn't feel buttery smooth but not tuggy either. So far, it's been the best shave with this razor. Even going ATG on the neck, it felt smooth so that's a big improvement for me.
Couple things I changed: Reset the bevel (skip the hard/soft Arks in the middle) and slow down during the Trans Ark (avoid raking the edge). I guess these changes helped produce a better result.
I also think this smaller 4/8 blade has something to do with the feel of the shave. Compared to the 6/8 GD, it feels a bit milder/less sharp? Maybe a bigger blade gives it more stability. Not sure but I'm glad to make some improvements with the Ark finish.
A light machine oil, sewing machine oil, WD-40 ect, would be a much better choice.