Making Scrapping a side business

Check your State laws. You may need a license and insurance. Here, you simply say you are in the business of XXX. It's not necessary to actually do anything. For instance, I was insured as a Landscaper although I have never had any associated equipment, tools and have never ANY work as such. For the curious, it was because of insurance as a snowplower. I only needed insurance for it for six months although they required a full-year policy. So I put down "Landscaper" with cheaper rates. Technically, I was in business as a Landscaper and Snowplower.