anyone successfully waterproofed?

I ran in snow quite a bit a few years ago with my old setup. It was a Scultze 18.61 and a Lehner 4200 on 7-8 cells. I would put the esc in a balloon, poke the wires thru holes in the balloon. This was all in a rustler with paddle tires. It would run great on top of hard crunchy snow. After a few runs there would be an inch of snow cover all of the inside. The esc and the inside of the motor would eventually get wet and quit working. Then I used to take the shrink wrap off the esc and open up the motor, put it all on a heater vent to dry it out. When it was all dried out. It would work again just like normal. I still have this setup, it's in my son's car, It's still going today and that was 2 years ago. It was a lot of fun but, a lot of work too.