Remove the sawdust with a soft push broom, then follow with a leaf blower or similar blower to get the wood as clean as possible. Finally, I would recommend a penetrating stain with UV inhibitor that is formulated specifically for decks. Talk to the folks at an experienced paint store for their recommendations (I would typically avoid the home centers for advice on something like this), and be sure and tell them about the Thompson's, since that may affect the penetration of new product you apply.
Initially, you will probably need two applications of stain to get the color and protection you want. After this initial treatment, in the future I would maintain the deck with a fresh application of stain every two years.
Q: I very much enjoyed you deck cleaning article, particularly the warning about pressure washing. Do you have any brand-name product recommendations for deck cleaning? --Lee G.
A: Over the years, I've had very good success with deck maintenance products from the Wolman company, which are sold at many home centers and paint stores. You can check out their entire product line, along with specific details on what product is used for what application, by visiting their Web site at www.wolman.com.
As to what specific product to use on the deck that's over the river, I contacted Wolman's technical representatives and posed the question to them. They recommended one of their products called DeckBrite in powdered form, which is safe for use in and around water.
Q: I have a large, ground-level cedar deck and prefer not to use any harsh chemicals to clean it, since I have flowers and other vegetation around it. Can I use vinegar and water, or perhaps a biodegradable soap? Thank you. --Barbara D.
A: For periodic light cleaning of your deck, I would suggest trying a powdered, biodegradable laundry soap mixed with water, applied with a long-handled, nylon brush. Sweep the deck first, and try not to overly saturate the wood while cleaning. Rinse with clean water, using a garden hose with a wide spray nozzle.
After the deck is clean and dry, I would strongly recommend treating the cedar with a penetrating stain with UV inhibitor. This will maintain the deck's color, and will help prevent breakdown of the wood fibers (fibers that break down will trap more dirt and over time will make the wood harder and harder to clean). Incidentally, there are a number of colors available in penetrating stains, ranging from natural for new decks to gray, which is ideal if your cedar has grayed over time and you like that tone.
