well to start you should waterproof the receiver, a balloon works well, then the servos. i would highly recommend keeping the body on and when finished dry everything real well. i wouldnt go too fast. spin outs at high speed= replacement parts $$$ dont go through to many huge puddle..
it stalled my engine with the quick stop and drastic change in temperature. i wonder if thats normal??? i kno some there are some good sites out ther tho