If you have no other choice but to park on "DIRT"....Don't do what I did....At least put a Harbor Freight Tarp down on the dirt and roll the car onto it. When I just recently moved my project (Parked On Dirt) under a tree, always covered, but you would not believe how much dirt has attached itself to the underside of the car....It was like a dirt magnet. I have another car that was parked adjacent but was on an old tarp, and it is really clean underneath by comparison. Also be aware that dust and in general dirt will find its way through and under the best car covers. Unless you can control the air movement in the garage and around the car, dust and dirt will settle on the cover. I'm speaking from personal experience. Good Luck.
