The wife and I have never had a fire more than a camp fire over the weekend in a community camp ground. Now we have 6 acres and our own 8x8 fire pit. BUT, What should and shouldn't we burn it it? Are plastics ok? Aluminum and metal? Any simple rules to live by when burning garbage? We would love to burn as much garbage as possible (we'll start composting soon also) but want to do it properly. Thanks.