Could be. Why not do it, yourself? Picture your energy extending from your body, going over top of the car towards the back. Then picture your energy going underneath it, and all around, until you have it totally wrapped. Now say, MINE, like you really mean it. You could also picture the bubble that you created around being filled w light. You could also walk around it burning incense or sage. Native americans used sage. Thay also used smoking tobacco. This kind of like canines marking their turf, or cats marking things w spit. We can learn from animals.
S
Btw, i don't do this on my car. Sometimes, i might do it in a room where i am.