I wanted to use my buffer, but I don't know why the cover keeps coming off. I used my power brush and the Dollar Tree toothpaste, but it didn't make a noticeable difference.
I used Crest and that didn't seem to do anything, either.
I watched tons more videos and Meguiar's 105 and 205 were popular, so I went to AutoZone to buy them and a drill attachment.
Each of those was $30!
I swear that you could have some place like Shifty Lube do it for $20, but I found Groupons for $50-70.
I might be able to do 7 headlights with one $15 kit, so why would I pay $90?
I found people saying they used Meguiar's PlastX and Harbor Freight has it for $8 and an attachment for $3, but they closed before I got there.
I finally found PlastX and a $6 attachment at Walmart and buffed my headlight for 4 minutes, but despite my crazy-bright headlamp, I need to wait until daylight to see how it did.
It looked clear, but still a bit yellow.
Curiously, headlights often looked clearer after the clear coat, like it filled in scratches or something.
Hopefully I can finally move on!
By the way, I bought $6 painter's tape, but my car was still wet and starting to freeze, so I just tried to avoid the hood and bumper, although that paint isn't great, and it is the wrong color anyway.