You should only spend a couple of minutes at the buffer. It sounds like you are trying to buff out major scratches?
I have 0 issue with burning Micarta on my polished knives using the following. On the tang and spine I go out to at least 15 micron around 1000 grit and then buff with green and then pink scratch-less. Tru-Grit in Ontario is carrying some new felt backed film belts in 1200 and 2000. I used these on my last batch; worked unbelievably well.
I don't want to contradict Adam. I have had issue with Scotchbrite and Micarta burning. I also spend less time on the buffer buffing across the tang instead of with(in line).
3 Loveless pattern tangs