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mould is filled. I started by giving the back of the Alu top plate a
brush coat of the Polyester resin. When this had completely dried I
sanded the surface with some 120 grit paper to receive the next coat. I
gave it a second brush coat of the resin and let this go off until
tacky, I then poured in and tamped down the sand mix. For this I mixed
12 Litres of sand with about 2.4 Litres of resin/catalyst and gave it a
thorough mixing. It makes a very dry mix but if you press your trowel in
to it the grains bond and stick together. It took about 9 Litres to
fill the mould, I patted it down and levelled it with a straight edge. |
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