/pa
Paint their vehicle (if it support painting)
In the game
Usage: /paint <0-255> [Optional:0-255]
Paints your vehicle with the colors you specify.
Some colors: Black = 0, White = 1, Blue = 2, Red = 3, Yellow = 6,Green = 16, Light blue = 152
eg To paint your vehicle fluro pink type /PAINT 232
What it does
Not explained in detail yet.
Wiki