Painting a parking sensor - where to go?

[jabjab]

Need to get a parking sensor painted before installing it but I don't want to pay an arm and leg to paint a nickel sized spot.

Anyone suggest where to go? I was thinking of installing and using a factory fill pen. This is for a c350 coupe

[carson blocks]

It's a small part, but don't use the fill pen, those are for stone chips etc. If you want to try it yourself, get a can of the correct colour match paint and use a few really light almost dusting coats. I don't think you want a lot of paint thickness on the sensor if you want it to work properly.