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Narrowboat undercoats are an essential component of the boat's paint system. They provide a base layer that helps to create a smooth and even surface for the topcoat to adhere to. Undercoats also help to prevent moisture and rust from penetrating the hull, which can cause significant damage over time. Like topcoats, undercoats are made from marine-grade paints that are specifically formulated for the unique conditions of canal and river waterways. They are applied using similar techniques, such as brushing, rolling, or spraying. Investing in a high-quality undercoat is essential for the longevity and appearance of a narrowboat. Regular maintenance and touch-ups can help to extend the life of the undercoat and ensure that the boat remains in top condition.

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