2-inch hand painted glass sun catcher This is copper foil wrapped, then strung with copper wire and decorated with colorful beads to bring out the vibrant colors of the painting. My suncatchers are cured, then sprayed with UV protectant spray on both sides so these may be placed directly in your window. For longevity, choose a window that is partly shaded, just in case, so that this beautiful piece will last a lifetime.