there's some spray paint called 'upshot'. i think it may be made by kilz. it will spray straight up, and comes in ceiling white. the spot may look a lil more white than the rest of the ceiling, but maybe you can feather your strokes so it blends?
i was watching ridiculous you tube clips of zombies. and filthy mouthed comedians.
and yep, i slept in til 9:30 this morning. prolly be a slug all day today.