The process in the first LF link takes about 20 min of prep, 20-30min of spraying, and a little drying time to be shoot-ready (though leaving it alone for some curing is only helpful). It's also designed to provide a
camouflage paint job, not the "my gun looks cool" preferred by the form > function crowd, though it certainly possible for both to exist at the same time, on the same gun.
The looooong part of the thread is folks sharing their results, variations, and tweaks.
Most folks that do this sort of thing professionally will tell you that the prep is the most important part. They're right, but I feel that spending a little extra $$ to buy Averoe paint is worthwhile. That said, Krylon and Rustoleum work just fine.
Mine's....ugly. But it has a nice personality.