Tail light cleaning/restoration

[73pony]

I am wanting to get my tail lights cleaned up. as you can see they are chalky looking, especially on the textured areas. I have scrubbed with dawn and tooth brush. Tried scrubbing bubbles and a bunch of other things to no avail. Any suggestions. Pic is attached.

 

[Hemikiller]

Propane torch

 

[73pony]

Propane torch

Huh????

 

[Stanglover]

IF they were out of the car, I'd suggest brake fluid. It won't harm the acrylic, but will eat any crud or paint overspray if there is any.
That however is a major job as the lights need to be totally taken apart.
Winter project??!!