It depends how glossy you want it. Look at my tail lights (url in my sig to my cardomain), that was what I did with my own clearcoat, however not with a flat color.
I experimented with clearcoating a flat black emblem that I had removed while redoing my grille, if you want, I'll post pics of that.
I think you should really consider just having it professionally painted.
If you do want to DIY, I'd suggest just finding a color-match and going to an auto-body supply store and buying a color match of sintari one-stage paint (it includes clearcoat) and stripping your current paint down, roughing it, then spraying it to match your body color.