Cover up all electrical wires, etc. with plastic bags. Make sure engine is cool. Spray engine with water. Spray degreaser all over the place. Let it sit for 5 minutes. Spray water to get degreaser off. If theres really bad spots, repeat and brush the spots with a brush or something. Dry the engine off with some towel, then turn the car on and let it idle for 2-3 minutes. Dry with towel again. Then go ahead and add plastic dressings, hose dressings, etc. etc.