Answer
Lower grit is coarser. Higher grit is finer. Use coarse for removal, medium for prep, and ultra-fine for finishing.
Why it happens
Lower grit numbers are coarser and remove more material. Higher numbers are finer and leave smaller scratches.
Recommended grit
Use low grits for removal, medium grits for prep, and high grits for fine finishing.
Wet or dry
Applies to wet and dry sanding.
Success check
The chosen grit matches the job: removal, prep, fine prep, or finishing.
What to do
- Choose 60 to 120 for heavy removal.
- Use 150 to 240 for general prep.
- Use 280 to 600 for fine prep.
- Use 800 to 3000 for wet sanding and polishing prep.
Avoid: Do not choose the highest grit first when the surface still needs leveling.