I painted mine off the car, however ran into issue when trying to squeeze the rubber grommet back into the hole in the boot lid. The paint cracked almost instantly and now looks crap.
My plan over the next weekend or so it get a new rubber grommet, fit it to the car & the paint with a touch up pen in-situ. Hopefully this way once the paint dries there will be no need to bend or miss shape the rubber causing cracks. Not sure if it'll work though