Answer
Stop and clean the residue before moving finer. Switch to fresh paper when the sheet is loaded.
Why it happens
Residue can come from the surface material, old coating, slurry, or loose dust.
Recommended grit
Use the grit required for the task, then clean before changing grits.
Wet or dry
Dry for normal prep; wet for fine wet-sanding stages.
Success check
The surface is clean before the next sanding step.
What to do
- Stop and wipe the surface.
- Check whether the residue comes from the coating or material being sanded.
- Rinse or clean the sheet.
- Switch to fresh paper when residue keeps loading.
Avoid: Do not sand dirty residue into the next finer grit.