Light is very important right from cleaning your vehicle till the completion of detailing. However we should not clean our vehicle under direct (midday) sun and while apply detailing products. If you have no option but to clean and detail your vehicle in open space, best time is morning and in the evening.
Look at this wheel. This car was parked in a closed space with limited lighting. It does not look very dirty.
Now I took another photo with flash and see the difference. There are quite lot of dirt.
Alloy wheel, Tire and tire wall are having lot of dirt.
So it is important to do the cleaning and detailing activities under proper lighting conditions.
In general, don’t use pressure washer. Water would seep into electricals and engine. Don’t wash your vehicle during mid / hot sun. Soap solution would dry very soon before the removal. Also not in the dark it would be hard to locate the dirt.
Don’t apply too much wax. Apply just a thin layer of wax. Don’t apply wax when the temperature is very low. Removal can be difficult. Unlike other products, you should let the wax dry on your vehicle’s surface so that the removal is very easy.