Front grill query

Hi troopers.

So I took the 2 vents off the front of the car today and sprayed them gloss black - they look ace, but now the big grill underneath (the mouth as I call it!) looks a bit odd as it isn't as glossy. Tomorrows job is spraying that.

Now my question is... How do I remove it so that I can do it off the car? I'm not particularly savvy when it comes to nuts and bolts so any help (that a 2 year old could understand) would be much appreciated!

Thanks all!