If you remove it you are also removing your number plate lights and yes, it will leave holes.
Better to fit the boot handle from a prefacelift k11, maybe even colour code it.
Nahh, if it's pre-painted, all you need to do is rough it up a little and start painting. If it black plastic, then you'd need to rub it down so it's smooth and then paint it. It's always easier if it's already painted.