Plastic lawn chairs are an inexpensive, practical solution to seating in any outdoor lawn, garden or patio area. The plastic is resilient, withstanding the effects of rain, wind and sunlight. After years of use, however, plastic chairs can accommodate a build-up of dirt and grime, and the colours can begin to fade from exposure to the elements. If you are seeing these effects in your plastic lawn chairs, it might be time to restore them to their classic cleanliness and brightness.
Remove the surface layer of dirt and grime with a regular washing. Fill a bucket with warm water and mix in a mild detergent such as dish soap or laundry detergent. Thoroughly wet your lawn chair with a garden hose. Soak the scrub brush in the soapy water, and scrub the lawn chair. Rinse with the garden hose to remove residual suds and surface dirt.
Purchase a speciality cleaner to work through stains or dirt and grime build-up. Most supermarkets, hardware speciality stores or home improvement stores will sell biodegradable cleaners that will not harm your lawn.
Apply the speciality cleaner. Amount of product to be used, diluting instructions and cleaning time will vary depending on the product, so read all directions and warnings before using.
Spray WD-40 directly onto the surface of your lawn chair to restore the shine and colour. If you have a gallon of WD-40, put some into a bowl and use a cloth to apply to the lawn chair. Wear protective gloves if you wish to avoid direct contact with the WD-40. Wipe the surface clean with a lint-free cloth.