[mulligan]

If you intend to have your lanai/birdcage painted, and the contractor acid washes the slab, make sure they either flood the area after the acid wash to dilute the acid, or use a neutralizing rinse ( baking soda and water ?). If this is not done, the white screws holding the frame will rust, and the paint will begin to bubble off the screen frame. This condition will not be covered under any warranty. I followed the trail all the way back to the distributor of the framing and found I was on my own to replace or repair.