I did mine myself and the engine color too. Not a professional job but I like it. Yea, you'll need to prep it good and apply spray adhesive first. I took pics before I removed the fingerprints on it to get it back on
You just need to make sure it's totally clean(use dish detergent, not the ones with lotions and stuff!)and you can use adhesion promoter(which I don't care for) I use Duplicolor rattle cans and if I have a problem I use the PS2 silver as a base/primer.