So I was faced with a little fogging:
Another less clear shot:
Some Mags metal polish applied (I went over each headlight about 10 times alternating from circular, to up and down, side to side rubbing. I applied the mags with just a regular cloth, then buffed it out with a microfibre towel. 10x per headlamp!
After that I then sealed them with C4 GTechniq.
For comparison the right headlamp now looks like this:
Came out really well:
Here's the after shot for the left headlamp:
Another angle:
I'm rather happy with how they came out. It would have been easier with a DA polisher though It took about an hour or so to do. However, felt very worthwhile. I just need to do a full detail to get rid of the swirls - that... I'm NOT looking forward to doing!