I bought a '79 Trans Am, new, my own special order. I washed it a lot, once three times in one day (washed in the AM, it rained in the afternoon, another wash, I went out for pizza in the evening, someone threw something on it, washed by moonlight). I can't remember the wax, but for sure it was OTC.
Stage Two came when my local body body shop (decent body shop) recommended 3M's Finesse-It Show Car Wax in the mid-90's. I got a PC and some Griot's polishes that Christmas, and so, things kicked up another (large) notch. By then, I understood how to get rid of swirls, but I didn't realize that I was inadvertently adding more, because of wash/dry techniques.
Armed with Autopian info, a foam gun, the two-bucket method, clay and good polishes, and quality WWs, I am ready for Stage Three. That's taking care of the very minor marring on my car when spring hits, and working on some "projects" (girlfriend's minivan, brother's Tahoe).
So, I guess I "detailed" the first time back in 1979. However, that work is nothing like the work I intend to do this spring.
You can always learn something new, can't you? That's the fun of hanging around here.