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I recommend getting a manual or search for your specific vehicle on YouTube. All cars are different and many have hidden fasteners or clips. A manual will help here. Body panels often have shims to align the hood, fenders, or doors. It is not easy. Most body panels are an integral part of a unibody. Large cars or trucks will sit on a structural frame while unibody cars like a VW golf will not have a frame. In this case, many of the parts are not removable. Repairs can be done to replace sections of the body, but it takes professional tools.

https://steemit.com/life/@smade/why-i-dislike-motivation-quotes

Thanks for that answer, will do some research and probably not try.