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I have a prefinished bedroom door and it appears to have developed a grey patch that looks like grease. The patch isn't grease, however it just appeared by itself. Any help as to how I can get clean it off?

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Do you have pets? Any explanation at all as how it got there? Usually discoloration happens for a reason. Is the location damp? maybe it is mildew.... –  Jack Mar 1 at 21:31
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I wouldn't mess with a magic door. –  DMoore Mar 2 at 20:00

1 Answer 1

I would try, in order of escalating cleaning function, these series of things until a suitable result has been obtained:

  • Wiping with a clean dry cloth.
  • Apply a little (15 ml/1 Tbsp) white vinegar to a paper towel and wipe. Rinse with a wet (water) paper towel.
  • Combined with vinegar or dish detergent (for hand washing), use a rough cloth or mild scrub brush (pink or white Scotch brite).
  • Green Scotch bright and soap. Repainting might be necessary afterward.
  • 220 grit sandpaper
  • 150 grit sandpaper
  • 100 grit sandpaper
  • woodworking plane
  • replace the door
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You forgot move out –  bib Mar 1 at 22:39

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