This is the final phase, and it is the most difficult. You should open and mix the finish you intend to use on your composite decking. After you’ve finished mixing, get your paintbrush and roller ready to apply the paint to the deck. If you wish to extend the arm of your roller to cover a larger area rapidly, you may attach a stick to it. Restore the look of your outdoor decking Wear a glove and other protective gear before you begin painting or staining to prevent the substance from spilling on you. Before applying the finish, make sure you cover anything you don’t want the stain or paint to leak on. After you’ve finished applying the finish, let it cure for a few hours. When your recovered composite decking has dried, you will see that the surface quality has improved.