Well, the wings were taken down after being on the ceiling 6 years...( Moving , building a house, Life happens )

Holy Cow , it's a good thing they were sealed with a varnish coat of epoxy.
I blew them off with high pressure air.
I was going to hose them down , but our outside faucet hasn't thawed yet.
So, bucket of water and a sponge. They are cleaning up nice. nothing sticky.

This kind of shows how ONE guy can do this... Up or down.
Gotta Fly...