I have indeed done this on mine
Simple really.... but the preparation is by far the most important bit! Not just before painting, but between each stage of the process too. This is what you need to do....
Remove the standard
badge and clean it well.
Sand it down to get a good surface to spray onto. Not too heavy sanding, so use a fine grit paper, but put some effort into this so it's nice and even.
Make sure it's clean and 100% free from dust from sanding.
Give it a few coats of primer
Allow to dry.. leave for at least 24 hours, preferably in an airing cupboard or something similar.
When dry, rub down with some very fine wet and dry sand paper under running water to get a nice, smooth, even surface.
Give it a few good, even coats of paint.
Allow to dry.. leave for at least 24 hours, preferably in an airing cupboard or something similar, just as you did after applying primer.
When dry, rub down with some very fine wet and dry sand paper under running water to get a nice, smooth, even surface. This stage might not be needed though, it depends on the paint used.
Apply a few coats of clear lacquer - this is important as this is your paints protection from the elements and from stone chips.
Allow to dry for at least 24 hours, as per the other steps.
When done, use some rubbing compound to finish things off nicely. Don't sand this stage.
It might look like a lot of work... but each step basically involves a few coats of each type (primer, paint, lacquer) and leaving about 15 mins between each coat, so it's not a lot of work. Then rubbing it down takes 30 mins, tops, so again not much work per stage.
If you can get hold of a spare 'S'
badge or entire front grill it saves you having to take yours off the car to spray
One thing you'll find is everybody has their own way of doing things like this, so I'm sure other people have approached spraying things like this differently. This is just my preferred method that's worked well over the years