I'm glad it helped. Don't get attached to colors too much - you need a dark grey acrylic spray paint, and a close match gray paint.
As for gloss coat, I started swearing by testors gloss hardcote but that stuff is expensive!
I've found that Future Floor Shine is amazing, widely available, and very cheap. It's so versatile.
-Straight for a gloss coat
-With ink for a wash/dip that beats army painter
There is much more about that here