Chemical Guys Black Frost is a musk and cologne scented interior spray built around an odour neutralising formula rather than a simple perfume mask. It comes as a 16 oz bottle for regular use and a 4 oz size that suits a door pocket or glovebox for topping up between details. It shares its sprayable format with the wider Chemical Guys air freshener spray range, which is designed for cars, vans, homes, offices and similar enclosed spaces rather than the car alone. It works best applied lightly once the interior itself is already clean, so it pairs naturally with interior cleaners and upholstery or leather care products used earlier in a valet rather than standing in for them.