To a point BM your right alot of the instructions are common sense, and you would expect most people to be able to do it. but what is also included are some useful tips like; suitable products for prepping the surface i use lighter fluid as its better than the usual meths or white spirit. it gets in better removes more crap and evaporates quicker with less residue left behind.
yes any old pleb can stick a decal on but not everyone can get it lined up or straight; (any one can drive a car doesn't mean they all drive like jenson button) tips like using masking tape as base line. or only tacking the centre to allow a twist motion aren't always something that comes to mind for people that haven't fitted much before.
nor is everyone aware that using heat improves glue adhesion, or that you shouldn't really use any glue externally in temperatures lower than about 10 degrees, (same with paint)
yes the basics of it is common sense but the idea was to lend some tips. i put it up so that when someone gets some vinyl from me, instead of having to re write every time the best way to apply it, i can just copy and paste the link to the thread.
i can strip down and refit a gearbox, to me that's a piece of cake, but it doesn't mean i look down at everyone else who isn't as capable, and think them silly because they can't.
i don't take this personally, hence why i suggested splitting the thread and allowing to discuss it. this is an open forum after all.