That is very creative idea. Sometimes there are many things that we can just re-cycle and re-use in such ways. The originality and at the end because it is handmade it is only one example of it. acrylic paints are really one that is great to use in such combination, when I was creating with my son for his Art class, we did a sea motif using sea shells but coloring them in different colors, even using acrylic spray with silver and gold colour that was a lot of fun. beautifully done work and really nice deco in your room :)