Get an ordinary, long-handled car washing brush at your auto supply store. This brush has soft bristles, and the handle fastens onto the end of your hose, which allows you to wash the fence just like you wash your car.
If the dirt is hard to remove, such as soot or grime found in industrial areas, wipe down the fence with a solution made up of the following: 1/3 cup household detergent (e.g. Tide, Fab, or equivalent powder detergent), *2/3 cup household cleaner (e.g. Soilax, Spic & Span or equivalent), * and 1 gallon of water. We have also found Magic Eraser or similar products work very well in most cases.
If mildew is a problem in your area, use the solution previously mentioned, but substitute 1 quart of the water with 1 quart of liquid laundry bleach.
Wash down the entire fence, start at the bottom and work up to the top to prevent streaking.
Follow the precautionary labelling instructions on the cleaning agent container. Protect shrubs from direct contact with cleaning agents.
Remove excess with plastic or wood scraper
Use a soft cloth to apply mineral spirits. Avoid polishing stained areas by using too much pressure. After removing the stain, rinse the area with water.
Remove excess with plastic or wood scraper. Chill gum to remove excess.
Use a soft cloth to apply cleaning
fluid (trichloroethylene). Avoid
polishing stained areas by using too much pressure. After removing the stain, rinse the area with water.
Make a solution of 1 tablespoon of oxalic acid crystals to 1 cup of warm water.
Apply oxalic solution with soft
bristle brush, wipe with damp
cloth, and then flush with rust-free water. Use rubber gloves and
protect eyes and face.