Answer
Use the kit by stages, not every grit on every job. Use 60–120 for removal, 150–240 for prep, 280–400 for fine prep, 500–800 for extra fine smoothing, and 1000–3000 for wet sanding or polishing prep.
Why it happens
A full grit assortment covers many jobs, so the correct starting and stopping point depends on the task.
Recommended grit
Choose the range by task: 60–120 removal, 150–240 prep, 280–400 fine prep, 500–800 extra fine, and 1000–3000 wet sanding or polishing prep.
Wet or dry
Use dry sanding for removal and general prep. Use wet sanding for finer stages when the surface can safely be rinsed.
Success check
The selected grit range matches the task and the surface is ready for the next operation.
What to do
- Decide whether the job is removal, prep, fine prep, or polishing prep.
- Start with the least aggressive grit that fixes the problem.
- Use 60 or 80 only for heavy removal.
- Use 150 to 240 for normal smoothing and prep.
- Use 280 to 400 before many coatings.
- Use 500 to 800 for extra fine smoothing.
- Use 1000 to 3000 for wet sanding or polishing prep.
- Stop when the surface reaches the finish level needed for the job.
Avoid: Do not use every grit automatically. Extra sanding can waste time or create unnecessary risk on thin coatings.