The proportion of heartwood to sapwood in the main stem does vary with species. Black locust, for example, usually has a very narrow band â often less than an inch â of functioning sapwood, whereas maple stems often can have many inches of sapwood and relatively narrow cores of heartwood.he proportion of heartwood to sapwood in the main stem does vary with species. Black locust, for example, usually has a very narrow band â often less than an inch â of functioning sapwood, whereas maple stems often can have many inches of sapwood and relatively narrow cores of heartwood.
1 Apply stain only at the proper temperature. 2  For most stains, 70 degrees Fahrenheit is the optimum, with the safety range from 50 to 90 degrees Fahrenheit. 3  Stains do vary, so check the label first.o assure the highest quality results when applying exterior wood stain, follow these steps and helpful tips from Sherwin-Williams stain experts. 1  Use the right brush. 2  Use a natural-bristle brush for oil stains and a synthetic-bristle brush for latex stains.
The fence must not be wet when you begin the staining process. Step 2: Check the Forecast. You will want to check the current weather and the upcoming weather before beginning your fence staining project. The temperature should be no colder than 50Â°F.You also want to choose a time where sunny, dry weather is expected for the next few days.ake sure you like the color and that the wood reacts well to the stain. Step 5: Do the Project. After the fence has been cleaned, dried, and sanded you can begin the actual staining. Use full, up and down brush strokes and work on one board at a time.