I can find a girl to do it for you if you want. Maybe a 13 year-old? Lilpooky! Sweetie, can you help out one of Dad'* IDIOT friends?
On the serious side, drill UNDERSIZED holes to start (pilot holes) and have a helper (cuz you have no 'friends') hold th spoiler in place and see how close you came. Then increase the size of the holes properly, making any adjustments as you go. It'll be alot easier than you think. I know it'* freaky drilling holes in painted body panels, but it'll work out just fine.