Did OEMs wet sand and buff paint?

I think it's funny listening to different thoughts. I totally agree with the single stage acrylic enamel paint and that is what I'm going to use on my car. Some of the paint sites will tell you not to do single stage paint. My car will be for fun. I do want it to look good, but believe this is the best method. The last car I painted was lacquer about 30 years ago. I can hardly wait to see mine finished.