Surfers Textbook

Section 11- THE CONSTRUCTION PROCESS—FILLER COATING, SANDING AND PIN LINING

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The following section of work deals with the technique of applying a resin containing a surfacing wax such as paraffin which can then be sanded to produce a smooth surface. It should be noted that this procedure can be carried out before or after attaching the fins or fin systems. The advantage in doing this before the fins is that the board will be sealed and therefore easily cleaned of marks and coloured resin without it getting into the weave of the ‘sticky’ laminated glass fibre.

After sanding a final gloss or finish resin is thinly brushed on to produce the lustre. The purpose of applying the filler resin all over the surface of the glassed surfboard is to ‘fill in’ the spaces between the weave of the glass fibre cloth and allow the surface to be sanded. Laminated resin remains tacky even when cured and if sanded will quickly clog up the abrasive paper and render it useless. The filler resin is simply laminating resin with a small amount of wax in styrene monomer added to it. The styrene ‘carries’ the wax and floats to the surface when the catalysed resin cures. Little preparation is required in order to apply the filler resin. Only one surface of the board can be coated at a time and it is not essential to tape off to prevent resin running to the under side as any lumps can be readily removed during the sanding process. ‘Hot” or fast setting mixtures are used to hasten the process.