In many people's opinion, if the car paint becomes dim, or there are sun lines or other scratches on the surface, just polish it. The construction time is short, the price is relatively affordable, and the effect is quite obvious. In fact, although polishing seems to be a direct and useful method. However, the thickness of the varnish itself is limited. Polishing again and again will make the varnish layer thinner and weaker, and lose the ability to protect the primer.

在隐形车衣问世之前，通常我们为了保护漆面，延长车漆寿命的方法有打蜡、封釉、镀膜、镀晶这几种。打蜡是其中成本的方式，它的原理在于用微小的车蜡组份填补划痕的凹坑从而恢复表面的平整，同时在漆面形成一层薄薄的蜡膜，让漆面不与空气直接接触，从而减缓漆面氧化的速度，以及减少空气中较大颗粒物以及阳光中紫外线等对漆面的伤害。打蜡确实可以短期内让车漆光亮，然而由于车蜡本身的柔软属性，所以持久度十分有限，一般情况下，洗两到三次车，蜡层就完全没有了。

Before the advent of invisible car clothes, we usually used waxing, glazing, coating and crystal plating to protect the paint surface and prolong the service life of car paint. Waxing is one of the cost methods. Its principle is to fill the scratch pits with small car wax components to restore the flatness of the surface. At the same time, a thin wax film is formed on the paint surface to prevent the paint surface from contacting directly with the air, so as to slow down the oxidation speed of the paint surface and reduce the damage to the paint surface caused by large particles in the air and ultraviolet rays in the sun. Waxing can really make the car paint bright in a short time. However, due to the softness of the car wax itself, the durability is very limited. Generally, there is no wax layer after washing the car two or three times.

比打蜡持久度更高、操作更省心的方式，就是封釉和镀膜。这两种其实可以算作一回事儿，同样都是在漆面上喷涂“隐形保护层”，只不过所用的材料略有不同，封釉的材料成本更低。虽然持久度明显优于打蜡，但是封釉和镀膜也会随着时间慢慢脱落，取决于使用环境，一般可以维持3-6个月。另外现在市场上还有一种快速镀膜产品，号称一喷一擦即相当于打蜡，甚可以实现镀晶的效果。性价比确实还可以，但是持久度也就介于打蜡与镀膜之间。

Sealing glaze and coating are more durable and easy to operate than waxing. In fact, these two can be regarded as one thing. They are also spraying "invisible protective layer" on the paint surface, but the materials used are slightly different, and the material cost of sealing glaze is lower. Although the durability is obviously better than waxing, the sealing glaze and coating will fall off slowly over time. Depending on the service environment, it can generally last for 3-6 months. In addition, there is a fast coating product on the market, which is known as a spray and wipe, which is equivalent to waxing, and can even achieve the effect of crystal plating. The cost performance is really good, but the durability is between waxing and coating.