I had to resurrect this thread as I run into the same problem with keeping track of the status of my razor's edge.

Came up with this idea:
Office Depot Brand Removable Round Color Coding Labels 14 Diameter Multicolor Dots Pack Of 768 by Office Depot

Red: needs honing ; yellow: needs touch-up; green: ready to go

Is that OCD? Do I need to go back on medication?