This guy is definitely a wizard when it comes to restoring stuff others abandon or throw away! In this 
you can see him and his buddy completely restore a motor bike that obviously has been underwater for a while, and looked like a total mess. Why did I think it was under water? Just watch him pluck away all the leaves and other debris from the frame.
It takes a lot of hard work, but he actually reuses quite a lot of the old machine, and basically only had to replce the parts that were missing. I have tremendous admiration for such a job, because of the very varied skills that are actually required here. If I took a bike like that apart I would need to make photos along the way to make sure I put it back together again properly.