November 1996
Beginner to intermediate
224 pages
4h 19m
English
Cold-setting polyester resins usually consist of the resin, a hardener and a catalyst. When mixed, they set as a hard brittle compound. In itself the resin is not structurally tough but when combined with strands of glass fibre it produces a material which is well known for lightness and strength.
The best moulds for resin and glass fibre are made from latex or flexible moulding compound supported by a thick plaster backing to prevent them distorting. If a plaster-of-Paris mould is used it must be treated with a suitable release agent.
First, a layer of resin known as the gel coat is applied to the surface of the mould with a brush. It is allowed to harden slightly so that the glass fibre, which ...
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