Originally Posted by Jaguartvr
Dolphin Glaze is a very fine filler that is ideal for filling pinholes...I would give it a coat of Upol Reface before primer...
I've previously used primer directly over filler and had no problems but I'll give Dolphin Glaze a try.
Unfortunately : "REFACE is not recommended for use over ... etch primers." which I've already applied. It's that coating that has revealed the pinholes.