Two points to make...
1. over 5 years ago I asked Formax Mfg. what grit size they had and they responded that the grit would range up to 6 microns in size. The Lee Valley paste has a finer size but they would not give specifics. I also prefer the handamerican paste or powder. Someone will chime in with the website that is currently selling it.

2. Try using a flat piece of hardwood such as rock maple as a substrate for the Chrome Ox. Others have had luck with the balsa wood. Both would require a stropping motion.

Hope this helps,