Grit measures sandpaper’s coarseness, determined by the size of the abrasive particles on its surface. A coarse grit wears down whatever you’re sanding more quickly, but it also leaves deep ...

Luckily, if you only need to scuff the surface, there is an alternative. Minimize the fuss and eliminate the dust with liquid sandpaper. Liquid sandpaper is a chemical substitute for hand sanding.

They’re not all additive, though; the final (and perhaps, most toxic) method here to achieve a smooth surface on a print uses solvent to remove some of the material instead. While sandpaper does ...