Peanut Butter is good but you are mainly covering up the wax stains with the peanut oil based on what I've read (and they will return after a rain or wash). A really simple, inexpensive, and effective solution that I have found is a Mr. Clean Magic Eraser. They are less than $1 and available almost everywhere (usually in the cleaning supplies isle). Wet it, squeeze out the excess water, and lightly rub the eraser on your wax stained trim. It will remove the wax quickly and easily (in my experience). Then just wipe with a damp microfiber and protect with the dressing of your choice. I would keep one eraser dedicated for your car because it works great at removing scuff marks on plastic trim as well (interior bottom of the door for example). Hope this helps!