The Detailing Fine Line Fluid Writer Paint Applicator Pen features a 0.5 mm gold-brass construction slanting tip, ideal for precise touch-ups on rock chips and scratches. Its fine 0.7 mm nib allows for drip-free, consistent lines, making it suitable for retouching tiny chips and detailed work. The pen can be used to apply a variety of paints, inks, liquid metals, and enamels onto flat surfaces such as fabrics, wood, metals, and canvas. To use, dilute the paint with water in a 1:1 ratio, pour into the storage tank, and apply evenly by holding the pen like a regular writing instrument. The vintage design includes an aluminum body with a knurled diagonal rod handle, ensuring durability and safety for long-term use. After each use, thoroughly clean the cup and stem with soapy water, using a thin metal needle to clear the inside of the stem, then rinse and dry completely.