What are the best wood-hardening treatments for pine outdoor armchair armrests?

Pine is a popular choice for outdoor furniture due to its affordability and natural beauty, but it requires proper treatment to withstand the elements. For armchair armrests, which endure frequent use and exposure, hardening treatments are essential. Here are the best methods:

1. Epoxy Resin: A durable option that penetrates deep into the wood, creating a hard, waterproof layer. Ideal for high-wear areas like armrests.

2. Polyurethane Finish: Provides a tough, UV-resistant coating that protects against moisture and scratches. Available in matte or glossy finishes.

3. Boiled Linseed Oil: Enhances natural grain while hardening the wood. Requires reapplication but offers a classic, rustic look.

4. Wood Hardener Liquid: Specifically designed for softwoods like pine, it strengthens fibers and prepares the surface for additional finishes.

5. Tung Oil: A natural option that hardens over time, offering water resistance and a smooth finish.

For best results, sand the wood lightly before application and follow with a weatherproof sealant. Regular maintenance will extend the life of your pine armchair armrests.