Lower control arm bushing - Help please

Hi all,
I'm putting my new front end together and the thin metal sleeve from the lower control arm bushing is still in the control arm. I read on the net that the only way to get this puppy out is with chisles and a hammer. Ok, started that and aside from bending it in, I'm not making any progress. Is this just one of those things that will take a few days of pounding, or is there a better way.

Thanks,
Stu