Review on ADVcer 500 2000 Sanding Assorted Flexible: Superior Abrasive for All Surfaces by Carl Movahed

Halve the sponge sheet and use the "Soft Block" sanding block (basically the same size). I already had a sanding block and used paper to wet the sandpaper. The water on the gray side and on the sandpaper will hold them together (very helpful). The water on the gray side and on the sponge will hold them together which is also very helpful. Using this combination helps achieve consistent pressure with little slippage.