Despite going through the primer, the surface is now really smooth and even - so my question is, can I move on to the pattern coat high gloss now? Or do I need to ensure that there is no filler showing through the primer? I probably have enough primer for one coat left, but it's taken about 6 hours of sanding on this last coat due to the constant clogging of the sandpaper so I want to avoid another primer coat if possible.