I like powder coating!! Last a very long time, will not rust and easy clean up. The colors that they have now a days are very good with many choices. You can see a difference between powder coating and paint but there is not that much of a difference. What you can do is both powder coating and paint over the top. Powder coat the lower control arm and then go over the top of it with the Battery Protector. That will work even better than what I did.

Here is a picture of a NOS control arm....