There are three main types of deck stain: transparent, semi-transparent, and solid color stain. Transparent stain allows the natural grain and texture of the wood to show through while providing minimal protection against UV rays and moisture. Semi-transparent stain adds some color while still allowing some of the wood’s natural characteristics to show through. When using transparent or semi-transparent stain, be sure to go about the project one board at a time. Solid stain provides maximum color coverage and a wider range of color options, but completely hides the natural wood grain.