Here’s the test: if your marble looks dull, scratched, or etched even after you’ve cleaned it, you need restoration. Cleaning removes dirt and surface grime. It doesn’t fix physical damage like scratches, etch marks, or worn-down areas. If you’ve got dull spots that won’t go away, white marks from acidic spills, or scratches you can feel with your fingernail, cleaning won’t help. Another sign is when water doesn’t bead up on the surface anymore—that means your seal is worn and the stone is absorbing moisture. Professional restoration addresses all of that by refinishing the surface and resealing it. If it’s just dirty, cleaning works. If it’s damaged, you need more.