RE: Offroad 1/5 + beach = bad idea?!
ran the heck out of it, only issue was salt water caused a very quick pcm on the radio, so lots of protection for the radio gear.
after we were done the car was very very very very dirty in places we could not even imagine.
cleaned with fresh water( protect the electronics) and then lots of wd-40 to prevent corrsion, nitro cleaner/ electric motor spray would work well also as a last cleaner to leave a dry car.
we ran a prefilter on the airfilter, the very fine white sand is more likly to get inside the motor, or past the airfilter, and more likly to clog the air filter. best to have a prefilter, and to use oil on the foam to catch the dirt