Generally pinholes, usually called fisheyes in spray terminology, are from some form of surface contamination that creates surface tension to repel the sprayed material. In the world of spray finishing, it is usually from oils or residue on the substrate, but it can also be caused by oil in the line from your compressor. If your compressor has a water trap, make sure that you bleed it. Most portable compressors don't come with them, however, but you can add one inline if you diagnose that there is no other issue at hand. Before you go to any great lengths, though, try to spray it first with a very light dust coat or two before applying a heavier coat. I don't really have fisheye problems (although I"m still mostly using Chromata White instead of Lyve) but still find that I get a smoother surface from this technique. What you are doing is laying down preliminary material that conditions the surface, but not applying enough to allow the Glamour material to move around or get repelled by anything. I typically apply a couple of light dust coats, then one very heavy coat that flows out. If I want a slightly less glossy finish, I follow with another couple of light dust coats after the main coat has dried to stipple the surface.
