I was not entirely happy with the resulting texture of my sand+glue mix, so I started to experiment a bit with plaster, glue and dry sand. In short I added some spots of filler to make the board a bit more even, and also to create a greater variation in the texture of the surface. I then applied watered down PVA glue over the board and added dry sand to improve the texture.
|PVA glue/water mix + dry sand = love?|
|Three boards require lots of paint...|
|All three boards base colored.|