First of all I enjoy participating in a forum where so much knowledge is available and willingly given out to others.
Ok, I reset the bevel on a fine DMT and then ran it 130 times on the coticule until it started pulling a little. I did this with no slurry. Then I increased the water and did another 20 laps.
After that, I stropped it with CrOx about 50 laps and then 100 on the leather side.
Here's a possible scenario. Old Sheffield steel on a DMT = chipping of whatever size = uncomfortable shave. A coticule will need a slurry & a bunch of time to repair that.
Here are the pictures. I may still need to do some work on the edge and heel. I notice that the edge at the center of the blade is narrower than on the sides. Does this mean I have to put pressure with my finger in the middle of the spine as I am running it through the coticule?
No because how will you finish the edge with pressure in the middle of the spine ? You can't use pressure to finish. What you need to find is a stroke that makes contact with all parts of the edge & spine. The blade is no doubt warped & previous honings may exacerbate this. Also as Euclid said the stabiliser at the heel may be lifting the edge off the stone. That can be adjusted. Some links below: https://straightrazorpalace.com/adva...ing-heels.html
https://straightrazorpalace.com/honi...file-heel.html
The razor can be honed but possibly a challenge for you at this stage. You need to research & understand rocking & rolling X strokes but heel is first ,then a new bevel.