It's a valid concern! That moment of hesitation before sitting on a sunny park bench is something many people experience. You're right to wonder about the smoothness of the finish. Generally, modern wooden park benches are designed with public safety and durability in mind. The finish is typically quite smooth to the touch, but the level of smoothness depends on several key factors.
Firstly, the wood used is almost always pressure-treated lumber or a naturally durable hardwood like cedar or teak. This treatment protects against rot and insects, and the wood is planed and sanded thoroughly during manufacturing. The initial finish is usually a smooth coat of a protective sealant, outdoor-rated varnish, or oil.
However, the real test comes from weather and wear. Constant exposure to sun, rain, and temperature changes can cause the wood to gradually weather. This process may raise the grain slightly over time, making the surface feel rougher than when it was new. Regular maintenance by park authorities is crucial. Well-maintained benches are periodically sanded down to remove any rough spots and re-sealed, restoring that smooth barrier.
To check a bench yourself, give it a quick visual and tactile inspection. Run your hand lightly along the armrest or seat slats. Look for obvious cracks, peeling finish, or raised wood fibers. A well-kept bench should feel uniformly solid and smooth, not rough or splintery.
If you're still concerned, especially with children or delicate clothing, choosing benches made of alternative materials like metal or recycled plastic is an option. But for wooden benches, the vast majority in public parks are safe. The finish is designed to be smooth, and ongoing maintenance aims to keep it that way, allowing you to relax and enjoy your time outdoors without worry.