As for the clear, assuming your base has no metal flake:
When you're ready to clear it, wet sand it with very fine sandpaper. Then, wash it down and lay on a coat of clear. Allow it to dry, shoot another coat, allow that to dry, and then very lightly (with an even finer paper) sand it down. You're not sanding to remove the paint but instead sanding to level the surface. Buff to a shine.
Folks--clearly not you!--often overlook how easy it is to get a great finish with spray paint. The biggest issue you'll come across is the nozzle on the can, which can belch out a larger drip instead of a fine mist, resulting in a darker "dot" on the painted surface. But, with a little sanding and respraying, you can even get past this.
Really, really great job!