What should the outside surface of a firearm be cleaned with?

The outside surface of a firearm should be cleaned with a soft cloth or microfiber towel to remove dirt, dust, and fingerprints. For more thorough cleaning, a solution specifically designed for firearms, such as gun oil or CLP (cleaner, lubricant, protectant), can be used to prevent rust and corrosion. Avoid harsh chemicals that may damage the finish or components. Always follow up with a dry cloth to remove excess cleaning products.