Tire wear, what's causing this! ? ?

-I have used the air hammer on occasion.The bushing has to be driven straight out or you risk egging out the hole. That means driving it out using a pin through the opposite hole and a metal slug next to the bushing. And you still need to support the control arm so the hammer blows will be effective. Kind of a complicated set-up,sometimes requiring an assistant,but can be done in a pinch.
-I would think an easier method would be a couple of sockets and a length of ready-rod(all-thread). The factory tool works slick.A small press works next best.And then is an all steel work bench,a socket, and a big hammer.Theyre not usually that tight, unless theyre really rusty;which a wire wheel will take care of.