Try CorrosionX 🙂
http://youtu.be/s4z8QMgTEA4 – But don’t use it on a board with barometer without first covering up the holes in the barometer! 🙂 And the LCD screen may not be too fond of CorrosionX either…
I of course ended up drawing a case for it and adding a piece of clear plastic over the LCD display as well – Then putting on a cover on top!
I water proofed my ESCs with clear heat shrink and sealed the ends up with liquid electrical tape, my receiver and motors with CorrosionX and my servo with CorrosionX HD.
– But that’s just me…