I have oportunity to made few shaving brushes from Bog Oak (Gold and Copper) and in my oppinion it is big mistake to fiish it with CA. Bog Oak has very nice structure, especially black, so most pipe makers finish it this way:
-sanding up to 800 grit dry sandpaper
-sandblast piece (after that fine grain will be visible)
-applying one thick coat of Carnauba wax
-heat piece with heat blower that 1st coat of Carnauba reach inside the blank
-leave for 24 hours to dry
-applying few more thin coats
-buffing between coats
CA, varnishing, epoxy etc...definitely not for me when working with Bog Oak.