Restoration Cleaning Rare Burner

Hello folks! Today I want to show you my new restoration project. I found this strange rare burner at flea market, When I saw it I instantly made the decision to bought it. Then the seller said it’s old burner probably for cars and for camping. But I have no idea, if anyone knows what is it, please leave a comment. Restoration process was very long. I disassembled the burner and put in rust remover liquid then washed it. Also I used iron brushed to removed patina and dark points on box. For main box I thou