A full detail should be completed 3-4 times a year with maintenance washes (two bucket system that takes 45-90 minutes) as frequently as once a week. A complete detail covers all non-mechanical components of your vehicle: tyres and wheels, exterior paint, chrome trim, the interior surfaces, seats and carpets. If you are looking at a wash, decontamination and polish then check the weather for a 4-hour timeframe on a cloudy, dry day.