Is it necessary to apply a protective film on the side mirror housing?

[MacNorah]

In the absence of other reasons, you can apply a protective film to the side mirror. The functions of the side mirror waterproof film: Waterproofing is the most important function of this side mirror film. In addition, it also has effects such as oil resistance, anti-fogging, scratch resistance, and anti-glare from high beams. The principle of the side mirror waterproof film: The side mirror water repellent (not called rainproof film), also known as glass rainproof film, has a very simple principle. It forms a layer of film on the glass surface, allowing rainwater to slide off quickly. In fact, applying dishwashing liquid or toothpaste can also achieve this effect, but the duration will be shorter. Using products specifically designed for glass will be much more effective.