-waterproof and rub proof when dry

-easily cleaned with alcohol wipes

-its fine tip is small enough for writing but dense enough for drawing

-fast drying (dries within a couple of minutes)

-the tip can be taken off and washed under the tap

Using the POSCA PC-1M paint marker you can precisely mark each target for any given stage of the competition on your turret. Between stages, the information can be easily erased using alcohol based wipes and marked up for the following stage. Rinse and repeat.