I have had a little white wax buildup on the leading edge of the black grill delete piece that has been bothering me. I finally tried goo-gone to get it off. Worked great. I used a microfiber towel and wiped the whole grill delete down. I then hit the other areas that were black plastic like the outside mirrors and the hood cowling right below the windshield.
I was extremely satisfied as I don't like those areas to be shiney with wax or an Armor-all look.
Big Ron