I have a project of MDF and I am after a full water proof seal something non-toxic after drying, its a counter that will be used in a very wet environment. By the time im done I would like to be able to put it at the bottom of a pool pull it out and eat dinner off it all the while it not changing in any way shape or form. Being able to add colour to it as well would be nice. Any ideas? I was lookign at an epoxy and maybe a plastic paint but that can chip off if hit.