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.
Do not sand between stain coats. Once you are satisfied with the stain color, itâs time to apply a clear finish. After a minimum of 8 hours dry time (this can vary depending on your climate and temperatures), a clear finish is recommended to seal and protect your project.llow the Pre-Stain to penetrate for 5-15 minutes, and then remove excess with a clean, dry cloth. Within 2 hours of Minwax Pre-Stain Application, apply the Minwax Wood Finish Stain. For this project, the color used is Early American. Stir the Minwax Wood Finish thoroughly before and occasionally during use.