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For a test subject, testers turned to the smallest—but most gelcoat-challenged—vessel in the Practical Sailor fleet. Our 1974 O’Day Javelin’s highly oxidized blue gelcoat was pushing the limits of these products—it was probably a better candidate for a paint job. But the oxidation was consistently spread from bow to stern, and in the end, testers were happy with the job done by the top performers—and it was easier than painting it.
The test was simple: Follow the directions. Rate the directions, the ease of use (which includes whether applicators are supplied), and rate the shine quality and coating integrity over time. Price was also factored into the equation.
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There are reports of acrylic coatings peeling or turning yellow over time. In our previous long-term tests, Practical Sailor did not notice peeling until well past the claimed life of the coating. No yellowing was noted.
Another issue raised in reader letters is the effect marine cleaners have on acrylic coatings. We wiped the hull with two multipurpose cleaners—Spray Nine and Simple Green—and saw no ill effects. However, manufacturers of these gelcoat restorers warn that these mildly acidic products should be avoided. Black-streak cleaners and alcohol are also no-nos.
Finally, testers tried the various products designed to remove the coatings. Poli Strip proved to be the most effective, but it also was the most expensive.
