I also think I'll need to pre-treat it in some way to neutralize the rust. I've sanded as much off as I can and there's no pitting I can tell, but these seem to be steel or some other metal that isn't at all rust resistant. Even with the Citri-strip coated on there last night, the metal portions that didn't have paint already seemed to start generating rust. I sanded and used a green scouring pad, and just wiped them with some mineral spirits to get the dust off. Here's what they look like now.