Originally Posted by
floppyshoes
If you want to rough the surface with sandpaper and not ruin the polish you have already, mask around the part you want to sand with painter's tape. Once you sand your little diamond shape, leave the tape and it will help make sure you don't get epoxy where you don't want it.
Make sure, before you glue, that the surface is rough but clean. Buffing leaves grease behind. I would use alcohol or mineral spirits to clean the surface after sanding. Don't use acetone or naptha, these may dissolve the epoxy in the micarta.