Surface Still Feels Rough
The surface does not become smooth even after sanding.
Wood still rough after 120 grit
Wood fibers or roughness remain after sanding with 120 grit. Recommended grit: Use 150 or 180, then 220 for smoother prep.
Wood still rough after 220 grit
The wood still feels raised or uneven after 220 grit. Recommended grit: Return to 180 if roughness remains, then finish with 220.
Metal still feels rough
Metal still has roughness after sanding. Recommended grit: Start around 120 or 180 for roughness, then 220 and 320.
Plastic still feels rough
Plastic remains rough or uneven after sanding. Recommended grit: Use 320 or 400 for prep, then 600 and finer for a smoother finish.
Rough spots remain after fine grit
Most of the surface feels smooth, but a few rough spots remain. Recommended grit: Return to the last grit that still cuts the rough spots, then step finer again.
Preparing wood before finish
Wood needs to be sanded before applying finish. Recommended grit: Use 150, 180, and 220 for most wood finish prep. Use 320 for finer prep when needed.