Obviously clear coat them after polishing them.
But don't clear them after just 2k wetsand, you will see thousands of micro scratches in the lens and the light will flare like HIDs in halogen housings.
When you wetsand them, go length wise. DONOT, I Repeat DONOT change directions or use circular patterns, it will leave scratches in it that will never get out.
Tip, put some painters tape ofer the holes the bulbs go in. the silver inside the housings do not like water.
To be honest, Anyone that mods vehicles needs a good buffer. It will pay foritself in a year of use. heck I use mine for all kinds of stuff, from polishing counter tops, sinks, knives, etc. change the head and now you have a grinder...
I started with
this kit
And expanded from there.
You can get a cheap buffer but it will break and not do the job half as good and take 3x as long.
Cheap buffer for small jobs. never used it. but its cheap and will probably get the job done.