Appears to be Valspar plastic white but I'll try and tag him.  I went by that same thread with great results. 

Thank you @Dr. 240Z

I used appliance white on mine, had almost a full can already.

Edited January 18, 20187 yr by siteunseen

It was, 'Valspar Plastic White'.

The project was worthwhile doing as the lenses don't show any regression.

 

 

 

 

There you go!  From the Doctor.

http://www.classiczcars.com/forums/topic/50482-tail-light-restoration/?do=findComment&comment=459378

Edited January 19, 20187 yr by siteunseen