There's lots of black textured plastic trim on the GPA, and it's very easy to get wax/polish on by mistake. My dealer unfortunately managed to get white residue on the wheel arch extensions nearly all the way round the car when they prepped it from new.
It can be a pain to get off, but here are a few tips you can try.
I had some
Duragloss Wax Eraser kicking around from a previous car, and that did the job for me, although I suspect that'll only work if the wax is fairly fresh.
A small amount of peanut butter (yes, really) worked in with a finger can also work wonders - it's the nut oil that does it. Remember to use smooth, not crunchy!
Ground nut oil by itself, perhaps worked in with a toothbrush, is worth a try if you can't stand the idea of smearing your car with peanut butter.
And if you need something more aggressive, a soft pencil eraser like a nice
Staedtler can do the job.
