What is the consequence of neglecting to polish a boat's gel coat?

Neglecting to polish a boat's gel coat can indeed lead to damage from UV radiation. The gel coat acts as a protective layer for the underlying fiberglass, and when it becomes dull or oxidized due to environmental exposure, its ability to shield against harmful UV rays diminishes significantly. Over time, prolonged exposure to these rays can cause the gel coat to degrade, leading to discoloration, cracking, and ultimately structural damage to the boat itself. By regularly polishing the gel coat, you help maintain its integrity and protect the boat from the harmful effects of sun exposure, thus extending its lifespan and preserving its aesthetic appeal.

The other options are less relevant as they do not directly relate to the fundamental protective role of the gel coat. For instance, the idea that it attracts more fish is not substantiated in any practical context, and while a degraded gel coat might have a marginal effect on a boat's speed due to increased drag, that is not its primary concern. The notion that it has no significant consequence overlooks the critical protective function that the gel coat serves for the fiberglass and overall vessel integrity.