best way to smooth out a bad finish

Thank you very much Don!!  I will give a shot!  Greatly appreciate it

Fine wet or dry sandpaper- sand out and recoat.  You are very lucky if you can ever do a finish without doing this step several times.  Be sure to wash the area after sanding to get all the sanding dust off the model before you add the next coat of paint.  I find #600 a good grit to try for a start.