DeletedUser
Which BPs you get depends on the Age of the structure you're supporting I believe.
Structure is a general word for any kind of building. So to answer your question: yes.
However, if I were you I'd just tell everyone it doesn't work on Decorations so they actually support something worthwhile :p
Also be aware that Trees, Obelisks and Memorials are Stone Age structures.
The Stone Age has no Great Buildings, so polishing those will at least give you a 100% chance not to get a drop.
- L
Thanks, I thought I was wasting my polishes on decorations