On the other hand, if you start with sandpaper that's too fine, it'll take forever to sand out defects. In most cases, 80-grit paper is a good starting point for sanding planed or shaped wood.

Mixes can be modified for sprayed applications or plasticized with water reducer to create self-consolidating concrete. A GFRC blended mix of cement, sand ... with a hand-held mortar mixer ...