Sandpaper and re-painting.
You can try other methods, but you'll just end up sanding and re-painting in the end. It takes less than 5 minutes if you have matching paint.
Sand with fine grit sandpaper. Make sure you get every little bit of wax off or the paint won't stick. Don't worry if you remove paint along with the wax...you'll be re-painting anyway and it won't matter. After you've removed very little bit of wax, re-paint.