For a superior job, the use of a stain primer before solid stain application will enhance the durability and performance of the finish coat. Decking Stains are very durable. The alkyd resin bases provides a tough finish that is water repellant and mildew resistant. They are available in clear, semi-transparent, or solid color. Many houses and decks can be stained in one coat.
Some jobs require two coats.
Samples should be done. Extra coats will drive the price of the job up. When picking the colors, they should not only reflect your personal taste, but also the location and landscaping. One important aspect of the job is to find the right contractor or painter. Most often than not neighbors can help with a referral and tell you about their experience with a particular contractor.