This is another project that was sitting around for a long time waiting for me to finish it. I do have a few excuses: 1) Resin is difficult to work with so I normally put it off; and 2) Items should be varnished in warm weather. For these coasters, I use the Fluid Painting technique, also known as Pour Painting.
I first sealed the wood tiles using a white primer and let it dry for a few days. The paint mixture was 1 part acrylic paint to 2 parts Floetrol, with a drop of shredder oil. The different color paint, white, pink, light blue, dark blue, purple, red was layered in a cup (multiple time) and pour over the wood tiles.
I let the paint dry for weeks, before cleaning it with a mixture of Dawn soap and water. Again, I let it dry for a few days before spraying the tiles with varnish. And, then they sat for months. I had to dust them off before pouring the resin over the tiles. Resin does not like dust or oil. Either of these on the surface would cause bad results.
After letting the resin cure for a few weeks, I put glued cork on the back of each tile.