Silvaspray on a primered surface

[mdarr]

I posted a question awhile back but never got an answer to a problem I had in using Silvaspray. I primered a fiberglass fuel door on a car and then applied the Silvaspray as instructed. After letting it cure for three or four hours, I placed it in the copper bath. When I pulled it out, the copper had plated to the Silvaspray surface but the Silvaspray itself lifted from the primered surface. can you not use Silvaspray over a standard primered surface??