Hydrographic dipping (also known as water transfer printing, hydro dipping, hydro imaging, or camo dipping) is the process of applying decorative finish to 3D products. Any non-porous surface that can be submerged in water can be decorated. If you can get paint to adhere to the part, than most likely you can decorate it with this process. Examples of such materials are alloys, plastics, glass, hardwoods, fiberglass, ceramics, and metals. Products are decorated using a high quality pre-printed image, which resides on a thin base of soluble film.
This printed film is then placed on the surface of the water and sprayed with an activator, causing the base to dissolve. The film is activated causing the image/ink to remain floating on top of the water. Next the prepared part is immersed in the water, and the upward pressure of the water causes the ink to wrap around and adhere to the item. After the item has been submerged, it is removed from the water, cleaned and then coated with a high quality powder coat or automotive wet spray clear coat.