painting control arms
When you install the new ball joints in the UCAs, make sure you can torque it to the proper torque, I think its 125 lbs ft, but check your FSM, to be sure. When torqing if it just spins in the arm you will have to spot weld it.
When I paint arms, I first use an epoxy etch primer, then any good engine paint. Wipe everything down with wax, and grease remover first.
Dave