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... perhaps insulated to make a chilly bin to keep the wine and picnic lunch cool in :U

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I do agree with Michael - my point (not very clearly made :B) is that if using polyester resin, the diatomacious earth option WITH glass tape over is an easy, and very strong alternative to...

Many years ago, I used Diatomaceous earth as a thickener for polyester resin with excellent result. It sanded easily and was pretty hard wearing. I used it to build up the bottom of Hobie cats which...