For wood, I use the sheets dry. For acrylic, I use the squares wet. I find them easier to hang on to. I have had to fish a couple of the sheets out of the dust collector... They usually are a bit worse for the wear. I just seem to have a system down for the acrylics... Wet Dry grits through 2000, MM squares through 12000, (All wet) Then over to the buffer. I was thinking of going to the sheets again, or trying another abrasive, but I get great results, so I don't want to mess with different stuff.
Dave
Dave