1. Physical removal:

Physical removal is relatively simple and violent, and the macula on the fire board is removed by abrasive grinding and polishing until it is worn off. This method is more suitable for the boards of the fire board that have not been installed, but it is not very suitable for those installed stones or special-shaped stones, and it costs a lot of labor and materials. What is important is that the after-effect is not very good, because the boards can only be polished by a small hand mill after installation. Therefore, the effect is not ideal.

2. Chemical cleaning:

According to the relevant laws of chemical reaction, the original reaction will be neutralized, and then the effect of removing stains will be realized. For example, iron reacts with water to produce rust, and the main component of rust is the mixture of iron hydroxide and iron hydroxide. Therefore, as long as we adopt targeted methods and correct chemical reagents, it will be convenient and simple to clean. Here, it is recommended to use Zhongsino Super Rust Removal.