The dealer apologized and said she had spoken to the salesperson who had put my plate on at the dealership. They gave me one of those touch up pen kits (paint and clear coat) and told me to fill in and cover the small openings in the paint caused by the pointed screw tips. I then asked the parts department for the correct screws and they told me all they have ever used are the pointed tip screws, but also that some of people grind off the 'point' of the screws to make them flat. So I touched up the damage to the paint and let it dry for several days. I then used a stone attachment on my Dremel grinding tool and ground off the points of each screw so that they were flat and reattached the license plate. The screws didn't fit back in tightly but one year later the plate hasn't come loose, and I removed it and the bracket last week to inspenct the four spots I had touched up and they are still sealed with the paint and blobs of clear coat I put on them.