doors

Alright so back at the very end of March I went on my first desert trip and when I was out there all of a sudden I kept hearing a hitting noise and asked my buddy what that was and he said it was probably just rocks hitting in the wheel well so I ignored it..... then I realized that it was...

Has anybody water proofed the doors on the h3? My rear doors always let mud in when im off roading, or when I just hit a puddle on the road, and I would like to make the door as waterproof as I can. I would like to water proof the front and back. thanks!