Thanks. Since I'm just starting this business I don't have very many products on hand so I used these products and this process to clean and dress the engine bay
*Simple Green * Armour All * Car Brite Spray N' Shine
After setting the hose nozzle to mist, I sprayed the engine with water, I sprayed Simple Green on engine bay and was careful not to get any on the fenders to avoid streaks to the paint. I let the Simple Green set for 2 minutes and sprayed it off with the shower setting on my hose nozzle. I then used a blower to dry the engine bay. After the engine was dry, I sprayed the engine bay with Armour All. I then used a terri cloth towel and wiped down every part of the engine and paint to remove all the dirt and grease including all the dirt under the hood. I then took Car Brite Spray N' Shine in an aerosol can on all rubber hoses and seals for a finished product. Total time under the hood was about 45 minutes -- Marc