[Mark_T]

While you may be able to achieve some improvement by spot patching, it will not pass a close inspection. To do a really good job you will need to re-spray the entire panel. You don't need to sand it down all the way, but you will likely need some glaze putty to fill the deeper scratches. A good coat of primer is your final layer of filler and will reveal any spots you may have missed. Wet sand and repeat until perfect. Then you lay down a few coats of paint, carefully wet sand to remove any imperfections, and then apply the clear. It will probably turn out ok, but don't expect a pro finish. It is virtually impossible for an amateur working in his gagrage to avoid orange peel, gribleys, and other flaws in the finish.

I'm sorry, but you are wrong that anyone can do a pro job on body work given enough time and effort - it also requires pro equipment. Unless you happen to have a completely dust free spray booth and, professional grade sprayers, and a few years of experience doing body work, you will not be able to obtain Porsche-worthy results. For the 3 or 4 hundred bucks it costs, take it in. Sorry, not want you want to hear, but the way it is. If you are willing to settle for less than perfect, then by all means give it a shot.