What is the primary purpose of applying a finish to wood products?

Applying a finish to wood products primarily serves to protect the wood and enhance its appearance. The finish acts as a barrier that guards against moisture, dirt, and damage from UV light, which can lead to deterioration over time. This protective layer helps to maintain the integrity of the wood and prolongs its lifespan.

In terms of aesthetics, finishes can enrich the natural color of the wood, provide a desired gloss or sheen, and even highlight the grain patterns, making the finished piece more visually appealing. This dual function of both protection and enhancement is crucial in woodworking and cabinetry, where the appearance and longevity of the product are key factors for both the manufacturer and the end user.

The other options do not capture the comprehensive purpose of applying a finish. For example, while some finishes can provide a degree of water resistance, claiming that the main purpose is to make the wood waterproof is an overstatement, as not all finishes are designed to achieve complete waterproofing. Similarly, although some finishes may add a bit of weight, weight increase is not a primary function of applying a finish. Lastly, finishes do not improve the intrinsic strength of the wood; they merely protect the existing structure. Therefore, the correct answer emphasizes the essential roles of protection and aesthetic enhancement.