Plaster for grinding. ATM, Optics and DIY Forum Cloudy ...
May 12, 2017· plaster of paris has a bad habit of turning to dust under the epoxy i have used 50/50 plaster and cement. but if this is for the 8 " you talked about i would just use casting cement .stick the tiles right to the bare cement then cover the rest of the cement with a thin layer of epoxy. cheap tough and holds up to abuse.