I had assembled too much of the holster by this point so the slicker wheel could only help in some places. For inside edges and thicker parts I had to resort to using a spoon. The real trick is making sure it's damp enough to have an effect but not drowning other parts of the project. As you can see above, I put a screw and nut through it so I could chuck it in my drill press; I needed to slow the gearing down to not burn up the edges, but this gave me much more control.