Is enamelling called 'enamel' or is 'hard gloss paint' called 'enamel'?

The original description is:


A coating which is used on steel articles is vitreous enamel, sometimes called porcelain enamel. This enamelling, not to be confused with hard gloss paint, often called enamel, produces a smooth, shiny surface, nearly as hard as glass and difficult to scratch.Is enamelling called 'enamel' or is 'hard gloss paint' called 'enamel'?
They're both called enamel, but technically, only vitreous enamel is enamel. As the description you give says, hard glossy paint is often called ';enamel';, but that's really just a short form of saying ';paint that has a hard glossy surface that resembles enamel in appearance';. So when something is described as being enamelled, you sometimes have to check which one is really meant.