For Christmas, I wanted to give some nice coasters to my sister, but I could not find any that fitted my needs, so I made my own.
What you need:
A nice design for your coasters
Paint (I used gouache) and fine brushes (I used nr 1, 2, and 3)
Mod Podge or decoupage varnish
Also handy: Tracing paper
What to do:
As my design involved a quote, I really wanted to get the letters right. That is why I first drew my design using Adobe Illustrator. I then flipped my drawing, and traced it using my tracing paper.
The cork coasters had a drawing on them, so I first gave them a big coat of white gouache painting, to avoiding seeing the black drawing. When the white layer was entirely dry, I traced the drawing back on the four coasters. That way, I could ensure my letters would be right. Then I painted them according to my design.
When the paint was dry, I applied three layers of decoupage varnish with enough time in between to let the layers dry. This rendered the coasters waterproof.
It is hard to see on the pictures, but the varnish I applied was high gloss, giving it a nice finish touch!