What is level 1 rust commonly referred to as?

Level 1 rust is commonly referred to as "Light Rust." This classification indicates an early stage of rusting where the corrosion is minimal and is primarily surface-level. At this stage, the metal is still largely intact and can often be treated or managed with relatively simple methods, such as cleaning and applying a protective coating. Understanding this classification helps in assessing the potential damage and the necessary steps for remediation, as more advanced levels of rust would require more extensive repair efforts.