Not a Sharpie permanent marker, a Sharpie Meanstreak solid paint marker. Sharpie makes a variety of markers.
The most popular solid paint markers for monikers are Sharpie Meanstreaks, Markal Paintstiks and Sakura solids.
Lumber crayons are harder and can't make a fat, solid line as easily.
Markal Paintstiks are harder than Meanstreaks or Sakuras, making them harder to do details with. However, Markal Paintstiks are hard enough that they do not require a cap, meaning you can just pull it out of your pocket, make your mark, and put it back in your pocket without fumbling with a cap. You can also cut it into pieces.
Nissen also makes a solid paint marker called "Little Giant".