Enamel is ground glass powder which is melted and fuses onto a metal surface. So-called enamel paints are not enamel, but were originally termed that for their relatively hard and glossy finish. The scartch on your utensil can be pretty well ignored. It will do you no harm. If it looks rusty, just scrub it with a green scouring pad and use it as normal. After washing it, just rub a little cooking oil on the scratch so as to prevent rust developing. Scouring and oiling is what they do in the Far East with their Asian woks, which are nearly all made from ordinary steel which rusts easily.