Cleaning black walnut stains from concrete

Black walnuts produce an inky black chemical which can easily stain many surfaces. To remove a black walnut stain from concrete, follow these steps.

Materials

 * Rubber gloves
 * Goggles
 * Granulated chlorine (Warning: This chemical is toxic. Protect your skin and eyes with gloves and goggles when handling.)
 * Borax powder
 * Dish soap
 * Stiff bristle brush
 * Mop bucket
 * Spray bottle

Steps

 * 1) Wear rubber gloves and goggles to protect yourself from the chlorine.
 * 2) Moisten the stain with water, but not so much that puddles develop. Dry any excess puddled water.
 * 3) Sprinkle granulated chlorine over the stain.
 * 4) Use the spray bottle to mist the granulated chlorine on the stain.
 * 5) Set a timer for five minutes to let the granulated chlorine start to work.
 * 6) While waiting, create a mixture in the mop bucket of 1 gallon of warm/hot water, 4 tablespoons of dish soap, and 2/3 cup of borax powder.
 * 7) After the five minutes have passed, dip the stiff bristle brush in the mop bucket mixture and scrub the stain. Keep dipping the brush in the bucket and scrubbing for a few minutes. The harder and longer you scrub, the more of the stain you will get out.
 * 8) Rinse off the area with water, and the stain should be gone or almost gone. If the stain is not completely removed, repeat steps 3 through 7.