I'm looking at putting some posts up for No-Smoking signs at a local club frequented by a couple hundred kids a weekend + their families. One guy recommended Treated lumber, but I heard it'll eat into Aluminum Signs. I'm guessing the cheap metal fence posts from Lowes or Home Depot will be prone to bending.
What would be the best thing to use? If it's metal, what specs specifically should I be looking for? It's outdoors, so I'm assuming I'd be capping metal, or thinking I'd paint the treated white. Either way I'm planning on a 2 foot hole with concrete for the post to sit in so any kids hanging on it don't pull it out or over.
Thanks for your help!