I currently have my interior stripped and noticed how yellow the face of the rear window and pillar trims are compared to the backs.

I'm guessing this is down to exposure to sunlight (or smokers in a previous life?)

I've tried bleach and Oxyclean, and even a Magic-Eraser, but nothing is getting them back to the original colour. Anyone have anything else to try, or recommendations for a shade/brand of paint for these bits?

 

You can get a pvc cleaner specially for window frames

 

Do you think that it will get into the plastic and remove the yellowness?

 

you can buy plastic paint from any good body shop suppliers i just done a full wagon trim ,no plastic primers needed either ,mixed 4;1 with its own thinners ,im sure there be a colour you can match the trim too