Hydrochromic paint 50ml rvfm 234 800a this amazing paint changes from opaque to transparent when it gets wet typically the paint is applied over an existing image and produces a plain white surface as the paint dries if the surface is then brushed over with water the hidden image is revealed as the surface dries again it returns to its opaque state br br iframe height 315 src https www youtube nocookie com embed aqusnyjcmyq frameborder 0 width 560 allowfullscreen iframe rvfm hydro