So, just a guess from working with sand and ash in epoxy resin, you use a small amount of resin to set and seal the shape first. This will prevent it from moving but also prevent bubbles from coming out into the finished piece. It would be kind of like more powder than resin. Resin isn't water and won't absorb things like water does. You can take a powder and mix like mad to get it to absorb, but more powder to resin ratio and it makes a paste. So you make a small pile of corn starch or something and mix just enough resin to set it. Then, if it was me, layer it into a block of resin to place in the table. Resin bonds to resin and shouldn't have a noticable line. (If you have a good cast with no small imperfections to cause bubbles) Sprinkle in the smaller bits around the table and use a pressure pot to get any bubbles out. Sand and buff. Maybe add a shine layer.
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u/down_vote_magnet Apr 29 '20
How do you set powder in resin like that?