Some bright red lipstcik works as well if not better than blackening.
Usually the sandpaper and dowel only works if you have .010-.030 or so to take off.. I'd suggest in investing in some tools for the job or paying someone to do it if it is only a one time thing.
When cutting the laminate, be very careful and take small cuts. The laminates tend to strip off just before the glue line and then you have a problem. Each side of the barrel channel will usually have the grain running in the oposite direction.So you may need to cut towards the chamber end on one side and towards the muzzle end on the other side.
The glue is hell on tool sharpness,so stop often and resharpen.
Good advice!!!
