I have pics of the can in this post
http://www.rc-monster.com/forum/show...&postcount=424
It's a clear coat that prevents weathering and tarnishing of metals like brass, steel, aluminum, copper and other. It sticks to everything I tried it on, even Lexan. It dries fairly quickly and becomes very hard and tough. It's liquid like water so it gets into every little nook and cranny of the circuit boards of the ESC and seals every part of it. Using this to water proof your MMM will probably void the warranty, I never contacted Castle Creations to ask them about that, I just did it because I wanted to play in the snow.
Tremclad products can be found anywhere in hardware stores.