First rule: identify the sheen. What rescues a gloss door destroys a matte one — most scratch damage we see is actually repair damage.
Gloss doors
Fine haze and hairlines on high gloss respond to automotive-style finishing polish on a soft pad — work small, light, and re-check often. Deeper scratches that catch a fingernail need local respray and repolish.
Matte and satin doors
Never polish matte — you will burnish a shiny patch that reads worse than the scratch. Light scuffs often reduce with a warm soapy wipe and matte-safe cleaner; anything visible beyond that goes the touch-up or local respray route.
Prevention that matters
Bumper dots inside doors, closing drawers by the front not the edge, and a no-abrasive-pads house rule prevent 90% of what we are asked to fix.