Hi I have a kitchen ceiling made of plasterboard where someone has previously installed downlights which are slightly smaller than the original hole leaving a slight gap which I'd like to fill. I don't have a picture, but the hole is around 3-4cm long and 1 cm wide at most. As it's next to the lights, I'd rather avoid putting a backing board up there in case I hit a wire. Instead, could I use some mesh tape and jointing/topping compound to plug the gap, then sand flush and repaint? I'm repainting the ceiling soon so happy to do this all at once. Thanks