ArtResin epoxy resin will bond well to every medium, with the exception of wax paper and plastics including silicone (i.e. materials that repel water). It works extremely well on wood, photographs, inkjet prints, acrylic, oil paint that has completely dried, watercolour, spray paint, encaustic, ink, paper collage, oil pastel, sculpture, flowers, rocks, and other found objects. You may want to avoid pouring it over loose materials (this may include chalk pastels); anything that is not completely adhered to the surface of your work could potentially mix into the resin in its liquid form once it's poured and float around. Some lower quality papers absorb resin rather than allowing it to sit on top, in which case a sealant should be used over the paper first to avoid seepage. The best thing to do is experiment and have fun!