I'm glad to see the ammonia trick worked for you. I too have spent many years trying to make stuff look old, it's nice to be able to pass some of my knowledge on to a like minded rust-o-phile. And as far as second hand ideas go, let's see how many cog headset spacers show up in BO-9.
I actually stole that idea from a local good friend of mine! "kansas rollfast" on this forum. Thanks Kevin!