There are many, at times conflicting, recommendations concerning matt paint care. These listed here are the Standox findings; we cannot address questions relating to third-party products.
It is, in principle, possible to wash the car in a car wash. However, care programmes such as “gloss protection” should not be selected. Paint-protecting car washes are recommended as brush washes can, in the longer term, have a polishing, and therefore gloss-heightening, effect.
The best and most protective cleaning method is to wash the vehicle by hand with neutral soap, plenty of water and a soft sponge. Just as for traditional gloss finishes, bird droppings, dead insects and tree sap should be removed immediately. If that is not possible, soak the area concerned with water in order to remove the dirt without mechanical help if at all possible.
Micro-fibre cloths are suitable for this. Tar stains can be removed by car owners with a silicone remover in conjunction with the standard commercial cleaning agents. Avoid rubbing the same place vigorously with strong pressure.
Car manufacturers don`t recommend application of stickers, films or magnetic signs to OEM matt paints, and Standox recommends the same for refinish paints.