IMO tack coat and mist coats are not relevant to modern basecoat systems. Pay attention to what TexasKing said in his post (#278). Misting the base on isn't the answer nor is holding the gun farther away, they will just cause new issues like excess texture in the basecoat which will show when cleared. Your issue is what Texas stated along with overlap and coverage. Keep the gun head horizontal to the surface. Keep the gun perpendicular (right angle) to the surface. Don't tilt the gun. Dial back your fluid a bit when you do the trunk again. Tighten up your overlap to closer to 75%. Don't tilt the gun. Spray medium coats, don't try to spray too heavy. Some metallics take four, even five coats (medium) to get coverage. If you are still having issues you can get "blender" at any jobber or through SPI (Intercoat clear). On your last one or two coats reduce your RTS base 1:1 with blender. That along with more overlap and keeping the gun oriented correctly will solve it.
It's looking really good Jim, doing a great job.