Hi, does anyone know if the information (make, model number, UL rating etc.) stickers located on the sides of Selkirk metal chimney pipe should be removed prior to fireing? The stickers appear to be a metalized material but they do come off easily if desired without leaving residue. Seems like good information to have there for future referance if they don't burn but I don't know if they are designed to stay there or not. Anyone know? Thanks.