Glass bead blasting would leave a nice finish, I had a friend who did it for a living and I've had lots of engine parts done. On a knife it would show scratches really easily though especially with how easy H1 scratches. I'm not sure it would get into every little crevice like sand will, I bet jimping would really be a pain.
I wonder how a laser would do?
But yeah, unless you have free access to this stuff, you'd probably pay as much to remove it as you would for a new uncoated knife.