Yea I think the "You can't paint antenna's" come from the old days when some paint was lead based and the antenna manufacturer would use special paint which is what we use today as normal paint. The paints used by antenna manufacturers back then and now are either epoxy or polyurethane.
I have...
I found in the overhaul manual for the TCAS antenna the procedure to paint it, so we are going to start painting them with no problems, Funny thing is the TCAS is much more important to aircraft safty then VHF or DME and the manufacturer doesn't say anywere you can paint them.
I work for an airline and we replace many DME and VHF antenna's for paint erosion or chipping and I would like to be able to touch up the effected area's of the antenna but there are people that say you can't paint them. I have looked and looked and have not seen anything that says you can't...