My buddy gave me a drum he found behind an oil changing station that went out of business. The drum is bare steel (no red liner) and it doesn't look like it's ever been used. It's as clean as they come. Do I still need to burn the inside? I'm hoping I don't have to because I live in an apartment complex and can't burn that big of a fire here, but at the same time I want to make sure I wont have toxic meat.