looked up the DIY for clearing the yellow and it said to wetsand, buff, and wax.

I just painted my headlights black and polished the lense to make it clearer. Didn't think I could get it out. Was yellow'd really bad (barely see inside it).
Anyways, I tried some Meguire's Scratch X ,instead of wetsanding, that I had laying around and they're crystal clear now. Look factory. I got some pics but not up yet. I'll post them when I get them. Only about 4 coats and they were perfect. I might have had something to do w/ they we're still warm from baking them but, it worked.

 

you can also use mothers aluminum polish as well

shitty pic but as youcan see they look good, they were yellow and dingy from sitting for about a year

 

I'll agree. I wetsanded mine with some 1500, then went over it with polishing compound on my orbital buffer and then waxed them. Worked like a charm.