zxt: what the guy you were talking with said is not that really far fetched as you think. i can imagine those rubber ballons this guy was talkng about. Tamiya had them way, way back and having this on your electronics would really keep the water off... i think this rubber baloon was even made for the electric motor itself to shield it from water.

As to running Electric RC's in the rain... well i do it from time to time... even in the mud! Last time i did was through really heavy downpour. the car i used was an HPI Rally with the inner body protecting my electronics from the water. well my electronics did get slightly wet but i guess that wasn't enough to fry em but seriously... if you have your electronics sealed really well from water... i guess you would be able to run your RC almost through anything