Custom Challenge Coin Manufacturer in China: OEM Guide OEM guide for custom challenge coins from WangFuk Dongguan: tooling, enamel, plating, MOQ ~50, samples 7–10 days, production ~15–20 days. Quote-only. Read More September 22, 2026October 9, 2026 Posted in UncategorizedLeave a Comment on Custom Challenge Coin Manufacturer in China: OEM Guide