Russell,
The reply was not just on your behalf either. I get lots of guys who simply want to shave, refresh their razor and let a pro handle the heavy work. No shame in that.........well, a little maybe but it depends who you ask <g>.
As for the re-pasting I would say only when it needs it. It will get black and ugly and keep right on sharpening. I used to do 6 to 10 razors a week on my 4 side and I pasted it every 2 months. For a guy with one to a few razors you may go 6 months or more, maybe way more. When you feel it isn't removing metal it needs a dab more paste.
Tony