Yes, if you come out of your house and find a long thin scratch down the side of your car, you would say "Some b*stard has keyed my car!" (or something slightly politer of course).
Except for certain special cases (e.g. Attorney General), in English adjectives go before the noun they describe, not after. So it's a blue car, not a car blue. It's car keys (keys for a car). It's a tennis racket (racket for playing tennis).