It's pretty much the same as paintball without the paint. You do get dirty and dusty (but you don't get any paint on you) and it's really up to you whether you want to change or not to keep your car clean.
Personally I like keeping my car (READ: my parents car) free of dirt and dust so I don't have to vacuum/clean it as often.
No matter what I still change, however it's just because I don't like wearing full BDU's and all that while driving/getting a ride. At least change out of your BDU tunic and put on a t-shirt.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE