Hi! I have been gold plating jewellery myself for a few months now and I recently bought a sterling silver ring and tried to gold plate it but it didn't react or change colour at all. Any ideas why this could be? I had something else in the gold plate solution at the same time and it coated perfectly but the ring didn't change.

Could the ring potentially have some sort of e-coating on it that is preventing it from being plated? I notice the jewellery company I bought it from have in their info that they plate their own jewellery then finish with a clear e-coating to protect it so if it is e-coated with a clear layer does that mean it won't be able to be gold plated?

Might be a stupid question but I've plated 925 sterling silver many times and this hasn't happened so not sure why. Any help would be appreciated!