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1

Get a set of magnets (I think 4 but more may be needed) and drill holes in the wood on the side it sits against the mold and insert (glue in) the magnets. When you get ready to poor your concrete you place your wood and add the magnets on the outside of the mold, which should keep your wood in place. The bigger the piece of wood, the more magnets you need ...


2

Silicone works well as a mold material because virtually nothing adheres to silicone other than silicone. CA glue may not be a good choice, as it certainly will not adhere, but also may damage the surface of the mold. Your best option is to attach the wood to an outside jig or bracket of some sort, which has reference points to the mold that are not adhesive ...


1

I would say you are limited to using oil based paints to do this. You cannot paint acrylics over oils as the paint will later peel off or flake away. My suggestion is to buy a small inexpensive set of oil paint tubes. You can can buy an art set for as little as $20AUD. After the paint has thoroughly dried, give it 2 or 3 coats of an outdoor varnish to seal ...


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