The front side door s 1 with a size of less than 400cm2 is a kind of paint. Baking paint is actually a kind of paint. Strictly speaking, baking varnish is a kind of paint. At present, baking varnish can be divided into two categories: low-temperature baking varnish and high-temperature baking varnish, among which low-temperature baking varnish is rarely used in practice.