HRTKD

so let me get this straight, you waxed your black plastic trims as well as your paint?

Yep.  It looked really good for a few weeks.  Best it has in a couple years.  This is mainly the cowl piece between the hood and windshield.

Picture of the cowl is attached.

I put Machine Super Sealant on my truck in the spring and it looked great, especially the plastic trim.  Then, about 5 weeks later my plastic trim started to look white/chalky.  I didn't attribute it to the MSS at the time.  When I did my fall detailing I got the same results on the trim and put 2 and 2 together. 

I realize that MSS isn't designed for plastic trim but it looked so much better right after applying MSS that I couldn't resist.

What do I need to do to my plastic trim to get it back to "normal"?  Is there anything I need to do to remove the MSS from the trim before I try the Super VRT on it?