Likely causes The surface is not mechanically prepared for polishing.Sanding marks are too deep for a polishing route.
Recommended fixes Return to sanding or abrasive preparation.Do not keep polishing in the hope that final compounds will remove the marks.
Prevention Use LUXI Asian Blue + Sisal as an exceptional readiness test, not as a substitute for sanding.
Recommended workflows Hard second-group materials aggressive preparation: LUXI Black + SisalChoosing LUXI Green or LUXI Purple