i prefer to hit this sub from side top, it gives me 3 armbars on the arm i am attacking, americana, straight, kimura from this possition. i use my head to help if called for so my attack is more than 2 vs 1. this sub can be hit from closed/open guard bottom, s-mount, top half.
the way i was taught to finish was keep pressure and control of thier wrist pinned to floor, lift thier elbow, with the back of thier hand to the floor slide thier hand toward thier feet. making thier hand repesent a paintbrush, hence the name.
"every second your not training, he is..... and he is doing it, just to kick your ass"