You will want to do this in 70-80 degree weather ideally.  Stay in the shade.  2-3 people will allow you to get this installation done a lot easier.  We do not recommend going at it on your own.

One person will be pulling the vinyl off the backing as you go while the other holds the remainder of the material.  The last person can monitor the process and step in as needed.

Apply application fluid or soapy water (one or two drops of soap per cup of water) to the target install and nearby surrounding area.  Also apply it to the back of the PPF as it is removed from the backing paper.

With a liberal amount of application fluid on the target area and PPF, you can change the alignment of the PPF by gently pulling up on portions and setting it back down.

Once you alignment is ideal with an even amount of material extending over the sides and front of the hood, you can start to squeegee out the liquid.  If you have the full width version, you will have to stretch the edges over the sides while firmly pressing down the curved areas.

Try to get out all bubbles without damaging the PPF.  Take your time and learn how the material reacts to pressure.  Should you push down hard on our felt tip squeegees, they can leave some glue residue.  Any adhesive remover or Goo Gone should be able to remove that.