The compound is applied over fiberglass cloth supplied with the product.
Electrical tape for class H insulation is made of fiberglass cloth.
The parts are mixed and applied over fiberglass cloth supplied with the kit.
Immediately cover the area with a strip of fiberglass cloth that has been soaked in the mixture.
Then there is a painstaking sequence of applying layers, including fiberglass cloth, a resin finish and the photographs.
A. You can patch the hole with fiberglass cloth and resin.
But if it is in poor condition, cover the wood with fiberglass cloth and resin instead of canvas.
To get around this I once built water-floats of ps-foam wrapped with fiberglass cloth and painted on epoxy resin instead.
A better way is to wrap a wettable fiberglass cloth around the insulation like a bandage.
The parts are mixed and spread under and over fiberglass cloth that is included or available with the kit.