Danilo wrote:
My solution to moisture protection is to apply a clear lacquer spray, such as McDonald's or Krylon (there are others, as well). They are available in various surface finishes (glossy, matte, textured, etc.) and also provide UV protection on prints displayed in illuminated environments. You can get these from most art supply stores. Most mail-order places won't ship them as they are hazmat. Use in well ventilated area.