Hi all - I can get a lot of 55-gal. metal barrels for free. They were previously used for paint-related chemicals and have a closed top with a small opening. (But I can cut off the top.) I know a lot of people cut off the top and use them to burn trash. Can you think of anything else I can use these for?? Do you think burning them would effectively remove any chemicals left inside?? If so, what could I use them for then?? Any suggestions would be appreciated.