I'm not a detailing expert by any figment of the imagination. And, admittedly this is only the 2nd time since July I've tried to wax my car. The first time I got wax all over the black plastic and stained it white, so was hesitant to try it again. So today I washed her using Meguiars, then tried some Zymol wax... I followed the directions, and ended up with a mottled look. I only did the hood because it just doesn't look very nice. What am I doing wrong?