[Flagman]

I'm afraid that I wouldn't be much help. We bought the car new and it's never been an "every day" car. I've only used water and a damp rag to wipe the dust off. Maybe a little Zaino tire dressing on the hoses & plastic ducts/covers occasionally.

I do wipe down the engine compartment every time the car gets washed to keep the dirt & grime from getting out of hand.