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Clean Your Boat’s Hull with MaryKate On & Off

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MaryKate On & Off Gel
MaryKate On & Off Gel

© Tom Lochhaas

When your boat’s hull is stained or dirty beyond the power of most fiberglass cleaners, use MaryKate On & Off Gel for the toughest job. This is a serious acidic chemical that is safe on fiberglass, as long as you follow the precautions.

Use is simple: just brush it on, let it work for a few minutes, and hose it off. Be sure to wear heavy waterproof gloves, eye protection, and a respiratory mask.

Take a look at the before-and-after photos on the next pages.

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