How to Stain Pressure-Treated Lumber Hunker
21 Sep 2009 If you decide to wait three to six months before staining your deck, most unstained pressure treated lumber will begin to turn gray. The wood may also become discolored from foot traffic, wet leaves or spilled food. To the wood to a like-new appearance, you can gently scrape any affected areas with a carbide blade scraper. For a less labor-intensive option, wash the lumber with an oxalic acid deck-cleaning solution or an environmentally friendly alternative.
