How to Clean Gray Spots Off White Patio Furniture

The tactic you use to remove gray spots from white patio furniture depends, in part, on the type of patio furniture and the type of stain. Gray spots on plastic resin furniture are probably hard water spots; you can remove these with mild acids. Gray spots on painted wood furniture are a bit more problematic, as these stains are probably mildew. Left untreated, mildew can grow underneath the paint, reaching the wood and rotting it.

Vinegar
Clean cloth
8 tbsp. trisodium phosphate
1 gallon warm water
Scrub brush
Rubber gloves

Instructions

Plastic Resin Furniture
- 1
  Pour 1/8 cup full-strength vinegar on the spots. Wait five to 10 minutes for the vinegar to dissolve mineral deposits.
- 2
  Wipe the spots with a damp cloth to rinse away any remaining vinegar.
- 3
  Wipe the furniture dry.
Painted Wood Furniture
- 4
  Mix 8 to 10 tbsp. trisodium phosphate with 1 gallon of warm water in a bucket. Put on rubber gloves to protect your hands.
- 5
  Dip a scrub brush in the solution and scrub the area to remove mildew.
- 6
  Rinse the area with clean water and dry thoroughly.

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How to Clean Gray Spots Off White Patio Furniture

Instructions

Plastic Resin Furniture

Painted Wood Furniture