Yea I can understand your wrapping your head around the 60k grit. I have in addition to the regular 3200 - 12,000 sanding film, I have a set of sanding film of 16,000 to 60,000. It is a lot different from the previous set of 3200 to 12,000. It really smooths out the surface but it does not seem to get me the shine I like with the for mentioned sanding grits. It is all in personal preference. As far as wet sanding goes, I don't know the actual reasoning behind the process, but I would imagine wet sanding just seems to be much better than dry sanding. Also when a 1:1 is painted, they wet sand the finish in order to get the high quality shine.