Spoiler - how to remove, and hide holes?

Plastic / hard rubber plugs - designed for that application - painted body color & w/ flex additive are your best option. Seal them in with a good clear silicone and they will come out easy when required.

Now for some bad news - you may need to be sure to leave your spoiler outside for as much as the car is to avoid mismatching due to fading.

Good luck w/ that...

Rob

Don't remove it! Just put some phone books on the front seat, just high enough so you can look over the spoiler. It will also give the people who you pass on the road the appearance that you are a big badazz. Seriously go to Home Cheapo or Lowes and buy some plastic "push rivets" (they look like mushrooms) and use a dab of clear silicone to seal out the weather. Paint rivets with a close match "plastic only" paint, prior to installation. Total price should be about $6.00 as long as you don't have to drive 100 miles to the store.