Is it possible to process files in the Trash?

Is it possible to process files in the Trash? I'd like to save old versions of iPhone apps that are put into the Trash by iTunes. I cannot figure out how to do it though.
I enabled ScanInvisibles (defaults write com.noodlesoft.Hazel ScanInvisibles -bool YES) but I don't see any invisible files including the Trash directory. I've restarted my computer and still can't seem them.
Any suggestions?
I enabled ScanInvisibles (defaults write com.noodlesoft.Hazel ScanInvisibles -bool YES) but I don't see any invisible files including the Trash directory. I've restarted my computer and still can't seem them.
Any suggestions?