Staining a deck with a rag is typically a better option than using a brush, as it helps the stain penetrate deeper into the wood. However, both brushes and rags are best reserved for detailed work because using these tools on an entire deck can require tediously crawling around on your hands and knees. A pad applicator, sprayer, or roller are preferred alternatives to applying stain over the majority of a deck. Use a rag for railings and other detailed work, and let the wood soak up as much of the stain as possible before wiping away drips or pools.

Stain is meant to be absorbed by the porous wood, allowing some of the natural grain to show through. With that in mind, you don’t want to add more stain than the wood can absorb, as you risk covering up its natural markings. Generally, two coats is the maximum you should do, although very dense hardwoods may only be able to take a single coat.

DIY is possible but presents risks of uneven surfaces or improper adhesion; professionals offer expertise to ensure a lasting finish.

Rags used with oil-based stains are highly flammable and can spontaneously combust in the right conditions. To reduce the fire risk, throw them in a metal container after use and add rocks on top to secure them. Add an inch of water and seal the container. Take the rags in the container to a hazardous waste factory as soon as possible.