So I want to fully detail my car and I want to detail my engine. So do I detail the engine and get it all nice and clean and then clean the outside of the car and get more dirt on the engine? or do I clean the outside first and then dried and all that and then detail the engine and getting my clean car all dirty with all the engine gunk and grease? If only this was the biggest dilemna in my life!!! Your suggestions and recommendations and your "schedules" would be much appreciated! TIA