Choosing the Right Exterior Finish for Wood Furniture in Harsh Desert Conditions

When selecting an exterior finish for wood furniture that will be exposed to the intense desert sun, it is crucial to consider the durability and protection offered by the product. Considerations such as UV protection, ease of application, and maintenance requirements are essential.

Understanding General Finishes Exterior Finish Topcoat

General Finishes exterior finish topcoat is designed to provide a decent level of protection against the elements. However, when exposed to extreme conditions like those in desert environments, a more durable option is recommended. Marine-grade varnishes and spar urethane are often better choices due to their superior UV protection and longevity in harsh conditions.

Limits of General Finishes Topcoat

The product takes 21 days to reach light use, which contradicts the 6-month claim for deck furniture. This timeframe is too long for quick refreshes and touch-ups. General Finishes topcoat is not recommended for decks, indicating it may not be suitable for furniture that is frequently and closely exposed to the elements. The film for General Finishes topcoat needs to be intact to maintain protection. Any damage such as cracking, abrasions, or water intrusion can compromise its effectiveness. Repairing such varnish finishes is often challenging. Shellac is easier to repair but isn't very durable. Resurfacings with General Finishes topcoat can leave visible discoloration and textures.

Alternatives to General Finishes Exterior Finish Topcoat

For durable and easy-to-maintain finishes, consider marine-grade varnishes or spar urethane. These finishes offer better protection against UV rays and degradation over time.

Spar Marine Varnish

Spar marine varnish is a popular alternative for its durability and ease of application. It is designed to handle the challenges of outdoor environments, including intense sun exposure. Spar marine varnish is particularly suitable for furniture with complex shapes such as chair legs and braces.

Polyurethane

Polyurethane is another durable exterior finish, often used for decks and other outdoor structures. However, it might require more maintenance due to the need for sanding and re-coating entire panels. This can make touch-ups and repairs more difficult and time-consuming.

Oil Finishes: A Softer Yet More French Choice

For those seeking an easier application process and less maintenance, oil finishes like General Finishes' Outdoor Oil are a viable option. Oil finishes provide less protection than varnishes but are much easier to apply and maintain.

Advantages of Oil Finishes

They don't form a film, making them easier to work with and less likely to cause runs, drips, or uneven coverage. Scrapes or minor damage are easily repaired simply by applying more oil to the affected areas. The finishes penetrate the wood slightly, making them less likely to peel or crack over time.

Tips for Applying Oil Finishes

Look for an oil finish that contains tung oil or phenolic resin. These components make the finish more durable. Pay attention to the end grain of the wood, as water typically soaks in through the end grain first. Use a light touch to allow oil to penetrate evenly. Apply multiple thin coats over time, allowing each coat to dry before applying the next.

In conclusion, while General Finishes exterior finish topcoat can provide basic protection, it may not be the best choice for furniture exposed to harsh desert conditions. Marine-grade varnishes, spar urethane, and oil finishes can offer better protection and ease of maintenance. Careful preparation and proper application techniques are key to lasting results.

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