Thanks netsurfr!
I have an update. Thinking that I may have messed up the edge by TNTing when I shouldn't have, I waited to try again until my Filly strop from RupRazors came in. It did, and this morning I used the pasted side to frehen up the edsge of the Kropp--about 8 passes, until the edge looked smooth in the light. No random sparkles, etc. Then, 30 passes on the linen and 20 on the shell.

This time, I got a very smooth cutting pass on my cheeks. I extended a bit and tried my jawline (small cut there, nothing more than I still sometimes get from my DE) and then moved to my chin. Here, I had a problem. The blade would NOT cut the whiskers--if got stuck at the beginning of the stroke. I was scared to use more force, so I gave up. This s right under my bottom lip. The hair there is MUCH coarser than the rest of my face, for some reason...I know this from my DE shaves.

I guess the blade is still a little dull; I'll try another round on the CrO2 before my next shave. If that doesn't work, I guess I'll give it a go when my Barber hone gets here.

This is fun!