I used styrofoam for the background. I carved and glued pieces accordingly to make the design I wanted. I then grouted it with non sanded grout. I did about 5 coats of the grout. After the grout I sealed it up. Now it's finished and when I put pressure on the background it dents and the grout chips off easily. Does that always do that? Do you want thin coats of grout on? Did I just not wait long enough for grout to dry? Please help me out.
Thanks
Thanks