How to fix fiberglass....
 

The previous owner of my car installed hideous looking lights right above the grill on the front of the car. I want to remove them, but there will be holes. How can I fix these? It looks like he tried to install it in the stock locations first, because on one side there are two little drill holes. I sanded down the raised part of those drill holes, but I need to fill them in with something. What works?

If the holes are drilled in the bumper cover, there is a specialty type bondo for urethane. Works quite well. If they are in the metal, fill with regular bondo. Fiberglass would be more of a pita than the bodyfiller. Check with your local automotive paint supplier.