I have been using the following grits of sandpaper for sanding my pens. 150 ( rarely), 220, 320, and 400. The 320 and 400 is a black wet/dry paper. I have been getting annoying little white spots in my CA finish. I read that black sandpaper lends itself to this behavior, so I switched to a yellow brand of 320/400. The first pen I used thenew paper on... NO little white spots. Which I am pretty sure was ca dust in the finish. Anyway, my question is, did this switch fix my "white spot" problem? Or maybe I just did something a little different this time around? Any ideas. Here's the pen with the new paper. (I'm pretty sure I still need a photography course or something)