Backed into a tree in my yard . Dent is about 10" tall with no seams involved, just on the tailgate of my Grand. I don't need it to be perfect, but I would like to pop it out without making it worse. I know that I should hair dryer the paint from the backside but that is all I know. After I get the paint hot so it doesn't crack how do I pop it all out? What do I hit it with?