Fine tip paint pens are excellent for permanent marks on nearly all surfaces. Extra fine tips are .08 mm and available in either Sharpie or Markal brands. Fine tip are 1.3 mm and available from Sharpie, Markal, and Dykem.
Extra fine tips have a tendency to clog if you over prime them or leave the caps off. There is a very small passage for the paint care must be taken to keep this area clear. Fine tips are more poplular because they are more durable and still leave a fine line. Dykem fine line 33 is the only fine tip marker available with replaceable tips.
