When I got my '98 Deville it was the nastiest looking POS ever as far as being really dirty. Got the car looking real good proving that a turd can indeed be polished. Now its time or the engine. It, along with everything surrounding it looks nasty. I want to spray some degreaser on it and pressure wash it at the local coin op car wash. Is it safe to do so?. What parts should I cover up and be careful about getting wet?. TIA!