Always work on a cold engine. Protect vulnerable items with plastic film or waterproof tape. Test a small area before using on plated metals and avoid application to highly polished alloy finishes.
Apply generously and use a brush to agitate surfaces.
Hose off from the lower areas up to reveal the clean and sparkling finish. Do not allow product to dry. Avoid flooding air intakes, sensitive electrical components and using a pressure wash.
After cleaning, spray the wet surfaces with Vinyl & Rubber Care, and allow it to dry. This leaves all your plastic and rubber looking like new.