Most of us use Plasti-dip to paint the emblems. There are other brands available but the Plasti-dip brand is the best! Just tape off the surrounding areas of what you want to paint. Spray 4-5 coats, allow drying time between coats. You can spray a final coat of Glossifier (also by Plastic-dip) of you want it to be "semi gloss". Then just peel away your masking and anywhere you don't want the paint. Overspray will easily come off with a microfiber towel.
Tons of YouTube videos on Plasti-dip!
As for the light bar, search through the first 10 or so forum pages. Someone (sorry, forgot your name!) has just done this and it appears to be easy enough to do.