It depends if you are just going to tear them up again.

Powder coating does have it's advantages but it is expensive. It looks great and does look good much longer than paint. It isn't bullet proof though. You'll still get scrapes & gouges. The good part is that they won't spread. You'll still have to touch up the scrapes with paint so that area won't rust.

You'll be able to paint them 8-10 times for what it costs to have them powder coated.