Can we spray the antenna of a 1240 AP without impacting its reception and transmission capabilities?
I have seen, "wit' me oon two eyes I have," a document on the main Cisco site that says painting is OK, as long as it's an RF-benign paint (i.e., no metallic pigment or bases chemicals, like a latex paint).
I cannot locate the document now ... I'll look again when I have more time, but I've seen one.
I remember it because when I saw it, I thought about the paint possible absorbing moisture from the air and degrading performance in some environments.