Gel-coated board will produce "fish eyes" for the following reasons:
1. There is static electricity on the surface of the mold, the release agent is not dry, and the release agent is not properly selected
2. The gel coat is too thin and the temperature is too low
3. The gel coat is contaminated by water, oil or oil stains
4. The mold is dirty or has wax aggregates
5. Low viscosity and thixotropic index
