CTS Lights

[Warden]

I am going to be helping a friend try and restore the headlight lens' on his 03 CTS. Do any of you feel like advising on this proceedure? Not sure if the assembly is sealed and would need to be cut into to remove the condensation and such from the inside of the headlight? I have never ever worked on a Caddy.
Any help is appreciated and I did a quick (extremely quick) search but everything comes up Lincoln.
If not that;s cool; was just looking to see what I am getting myself into.
Thanks

 

[Warden]

Just looking for info to remove and access the inside; the actual cleaning and buffing I am fine on.