If there's no lubricant, Darkie toothpaste will do. (Note: The term "Darkie" was the former name of a toothpaste brand in China, which has since been renamed. However, the term "Darkie" is considered racially insensitive and offensive in many contexts outside of this specific brand naming. A more appropriate translation might avoid using this term unless specifically discussing the historical context of the brand.) A more sensitive translation could be: "If there's no lubricant, any toothpaste like the old 'Darkie' brand will work."