Jim Thompson wrote:
Many of you will recall several years ago I made a cage to prevent
birds from nesting in an entryway chandelier...

http://analog-innovations.com/SED/BirdCage.jpg

Prevents nesting, but the !@#$%^&* birds still hang onto the wire grid
and poop into the chandelier :-(

Since there has been recent discussion on S.E.D of flexible plastics,
I was wondering if there's something available flexible enough to redo
my "bird cage" so that the birds can't cling to it?

Not a bird cage, but a set of ~1mm dia monofilament radial spikes at two
depths will keep birds from landing on something. Widely used on
buildings, but I expect you could do your own using the chandelier for
support.

Regards,
Martin Brown