tiger.1000 is right. I used 3M trim cement in the spray can on mine. It will be near impossible to do with hood on car. Turn the hood up side down. It is easier to fit the mat first without glue. My mat had to be trimed some to fit right. One other thing I will mention you may already know. The harder surface of the mat gets the glue and goes down on the hood. I saw a '53 Mercury at a show last summer that had the mat
up side down. I do not believe the soft side will hold the weight of the mat very long.
Like the sod layers advice "green side up", in this case "yellow side up"
Hope this helps. Not a difficut job. You have to be careful. Good Luck. Eddie