Webbing solution is an additive to gel coat or paint that is used to create a spider web or spattered effect to it. It is mixed with a colored gelcoat and sprayed onto a contrasting colored surface. Decorative effects produced by the webbing mixture will vary and relate directly to techniques or gun adjustments. setting the spray gun to 10 to 15 psi creates a spider web effect, air pressure between 5 and 10 psi results in a spattered effect. The gel coat and webbing solution is usually mixed 2 to 1.