Wax Removal on Aluminum

[Monsterdetail]

Good morning fellow detailers.

My father was waxing his trailer and he didn’t ask me before doing it. He waxed the bottom black aluminum of the trailer and now he has stains/was residue that he can’t get off. I’m not to familiar with detailing trailers. Can anyone assist on how we can remove the wax residue and what we can use? I can provide pictures if need be.

thank you in advance

[Danube]

Yes, a photo or 2 would help, also what wax was he using ?