Well there are 2 ways to go about it.... one you could clean the hell out of it and if you choose this way you will want to make the cladding extremely nice which could take you hours.
The second way would be to find a truck with a winch and go get your VX absolutely covered in mud.... you may not win but you would have the "coolest" car in the show. Just make sure you get a spot dead center of the show so they know your muddy VX is in it.
2001 Ironman Daily Driver... 3.5" suspension lift (OME912 springs and 1" spring spacer), ball joint flip, 1.5" front diff. drop, 33"x12.5 TrXus MT, 16x10 Eagle Alloy rims, Interceptor, PV muffler, K&N air filter, Alpine Supercharger, Bilstein shocks, and some trimming.
2000 Ironman Project LS-1 VX... very slow progress but someday....... ohhhhh someday......