Note- the entire process from start (making the decision to not be waila and clean my headlamps, and going to the store to get the kit) to finish (when I started typing the word "Note-") took 50 minutes.
The pack I got was for $22.99. It seemed simpler and.. well cheaper than @haider99's solution (@haider99's solution). Plus all the materials were used up and there was no excess, so that was good.
Before I begin, here's my projector cutoff the night before. I wanted to see if cleaning the headlamps would improve it.


Starting with the project.
Before starting:



Step 1:
Use a spray bottle or a paper towel to wet the headlight and sand paper. This was 1000 grit. Wet sand for 3 minutes. Keep spraying the headlight so that the area remains wet while sanding.



Wipe off the residue completely with a paper towel:

I'll continue below...