Soft Enamel vs Hard Enamel for Custom Keychains and Challenge Coins How soft enamel and hard enamel differ for OEM keychains and challenge coins — look, durability, cost, and when to choose each. Read More September 19, 2026October 9, 2026 Posted in OEM GuidesLeave a Comment on Soft Enamel vs Hard Enamel for Custom Keychains and Challenge Coins