-Custom lapel pins are enameled by colors to make them colorful and outstanding, usually, we called these metal pins as custom enamel pins. While these custom enamel pins have two kinds of types--soft enamel and hard enamel, the two most popular types in the market. Different enamel process has a different sense of vision. Soft enamel pins have an uneven surface, you can feel the textured lines when you touch them. But the hard one has a flat and smooth surface without any textured lines you can feel.