Which way to finish suspension parts - Powder coar or POR-15?

I went with POR-15 on my car. It works great on parts that have rusted up pretty good and have a very rough surface. Smooth surfaces don't work as well, even if you've prepped with the marine clean, metal ready, etc etc.... In my experience it will still peel. Once it's cured for a while, it is pretty tough it seems. And again it's real good on rough surface parts. My car however is far from a daily driver so it doesn't get the road beating as much. My friend has a Jeep that his dad painted the entire chassis (including the sunlight exposed bumpers) back in the 80's with POR-15 and it's still holding up to this day. Bumpers turned cloudy a bit though, but not too bad looking.

I mainly went with it because of it's ease of use for me and that meant cheaper than powder-coating. I have heard it's not as expensive as you might expect but I never checked into it, just went with what I knew I could afford being on a very tight budget at the time. (I'm still on a budget, just not quite as tight as when I did the suspension. LOL.)