David Castle creates watermedia art infused with unexpectedly rich and vivid colors. His art is inspired by the variety of mountain and urban terrain discovered throughout his extensive travels in North America and Europe. Castle creates his exposure to the colors and shapes of these very different places and has developed multi-layered techniques that produce opaques and transparencies uncommon for watercolors.

David Castle also incorporates rich watercolor metallic paints into many of his paintings that highlight his unique abstractions. He has developed his own techniques for watermedia painting as he combines paper, water, color, air, surface tension and gravity to create each painting. Most recently, Castle has developed an archival quality technique for sealing his watercolor paintings on paper and then mounting them to acrylic-embellished, gallery-wrapped stretched canvas.