Wet and Dry.
I use this grit for a final 'pass' over the "It's Not Paper" and Hokus Pokus Decor Weaves once I've applied the final layer of waterbased satin varnish.
Can purchase 1 sheet, or 5-pack (5 for the price of 4)
600 grit very fine sandpaper
Rinse/clean thoroughly after use with dish detergent or other mild soap and the brush cleaning pad.