If there are just a few spots the best way to quickly remove the white residue is simply with a pencil eraser. It sounds weird but this is a great tip we learned while working with professional detailers.
 
I found a great video on youtube showing how it's done. You can see it here: https://www.youtube.com/watch?v=2-nXWVHjGCE
 
After you remove the white residue, you can finish with our Plastic Restorer to seal and rejuvenate the trim.

If you want something safe for all surfaces, including plastic, rubber, and decals, you can check out our Hybrid Wax.