BOSS is a problem solver product & not needed for every project, although you can use it on every project. Boss tackles orders, stains & bleed-thru & comes in White, Clear & Gray. White is recommended for painting with lighter colors; Clear is perfect for colors as dark or an the project piece; Gray is a happy medium between the two. Clear is also great to use on every project for an amazing paint base. Apply 2 coats for optimal results.