Open your trunk, and look underneath it. You will see 4 rubber plugs that are underneath there, pull them out to get to the spolier bolts (you'll need s deep well socket to get to them). As for plugs, you'll want to shave them completely using body putty. Of course you'll have to get it repainted for it to be done right. Of course, you could always go to a radio shop and get these little plastic plugs that are commonly used to fill holes made by external antenna mounting points. They go on with a little silicone and are a cheap fix, but will really make your car look like crap. You're actually better off kicking your own ass before anyone else gets the chance if you go this route.