Pen CA Finish
I don't have any pictures of work during the process, but this is how I do it...
*Sand through 220-grit, wiping off the sanding dust for each grit except 220
*Use an applicator with a few drops of thin CA glue on it to wipe off the dust
from the 220
*Put some mineral oil on a piece of 320 w/d paper and sand off the CA glue, filling the pores and sealing the pen blank
*Use a paper towel to wipe off all the mineral oil
*Use 400, 600 and 800 w/d paper, wiping off the residue between grits
*Fold a paper towel so it's thick enough that several drops of medium CA glue won't immediately soak through
*Wipe down the pen blank
*Put a few drops of tung oil (others use BLO, but I don't have any) on a clean spot of the paper towel and wipe the blank again
*Repeat the medium CA glue and tung oil once or twice--more than that isn't necessary, IMHO
*Let the pen sit for a couple or a few hours so the glue cures completely
*Go through the micro-mesh grades, 1500-12,000, wiping off the residue for each grade
All the above steps are done with the lathe at its slowest speed. Then I increase the speed to the fastest one (don't remember, exactly), and wipe the pen down with friction polish. Most pen turners don't do that, and it probably isn't necessary but I like the look. I only buff acrylic pens, but I don't make many of those.
Let the friction polish cure overnight before handling, 'cause it's soft.