Prep is Key!
Shop Deck Cleaners
Proper surface preparations is key to a successful project. Coatings require a cleaning to ensure surface is free of dirt, dust, grease mildew or mil glaze. Briskly sand all surfaces with a 60-80 grit sandpaper or chemically clean & brighten with a biodegradable solution.
When doing a new wood surface, clean before you sand! Even new wood needs to have these steps taken to ensure success! New wood develops a coating called "Mil Glaze", if this coating is not sanded off, your stain will not penetrate.
If you are re-coating an existing finish, the surface still needs to be cleaned with a Wood Cleaner prior to new coat of stain.