Summarize the following:
You're going to be changing the appearance of your wood with a solution of warm water and baking soda. After the solution is mixed, you'll apply it to your wood with a paintbrush, allow it to dry, and then you can stain the wood if you desire. All things considered, for this project you'll need:  A container (for your weathering solution) A paintbrush Baking soda Wood Wood staining (recommended; optional) Since you've only applied a single coat to your wood, it shouldn't take too long for it to dry. In most climates, 10 minutes should be enough for your wood to be ready for staining, though in humid regions this may take longer.  If your wood is taking longer to dry than you'd like, you can use a hair dryer to dry it more quickly. Observe your wood closely at this point. If it is not as weathered as you wanted, you should apply another coat of your weathering solution and allow it to dry again.

Summary:
Collect your weathering supplies. Allow the wood to dry.