l wanna remove the ''Mercury'' emblem from the trunk, but when l look on the inside of it , it looks like it has 3 screws but they look like nails so l couldnt unscrew them. Please let me know , thanx

Adhesive remover, just use that on it and pull it right out. The nail looking things are just plastic pegs coming out of the back of the emblem.

Those are alignment pegs that go through the metal, just use a wooden wedge to remove it and wo not hurt your paint. hope this helps.
Use some lighter fluid to clean excess glue and clean the paint finish.