In our own home we've used this method several times with great success. In fact, it works well enough we use it just once a year in the Spring to keep things looking fresh and new. Here's how:
Directions: Mix all ingredients thoroughly and use a small scrub brush to give your pieces a once over. Rinse, and repeat if there are any repeat offending stains.
Note: Peroxide can have an ill effect on a small portion of fabrics , although usually only when left on for a great length of time (think a few hours) and when used on those which aren't meant for outdoor use. Make sure to work on one piece at a time, rinsing as you go, before moving onto the next piece to avoid any problems.
We haven't found a surface yet that this mixture can't clean, although if you're looking for more specific methods of cleaning your hardworking outdoor surfaces, check out these links for more information: