Hot rolled steel is generally used in parts where rust proofing is not critical. There are processes that allow hot rolled sheets to prevent rust as well. This process is called HRP&O – Hot rolled pickled and oiled. During the pickling process an acidic solution is used to remove contaminants and other unwanted elements such as stains and rust. Once this pickling process is complete the acid is rinsed off and dried. Once finished drying we then apply a thin film of oil to the steel to prevent it from rusting.