I’ve painted models since I was a kid, and yes I have changed my painting methods over the years, this is mainly due to the paint manufactures and the makeup of todays new paints on the market. Since Scale Coat and others are gone from the hobby paint market, I find myself using other paints that are available to be used with very good success. First let me say I do not strip my models for repaint, I do sand out the lines and printing, or as painters would say, feather edge the lines out that would be there. This way when you repaint you will not see the old printing, etc. show up when you repaint with new paint. I myself in most cases do give the model a light primer base coat, this is so when you repaint with the new color your model will look equally covered, that is the color will look uniform all over. I apply the paint I would say three coats are usually what I do, a light tack coat, a cover coat, and the last coat a cover coat probably a little wetter so all will flow out to an equal eye pleasing coat. Most of these coats are around 10 mins. apart, depending on the weather tempters and if the other coat has tacked to take another coat. I will say this is a learned process and it is not going to be like painting the lawn chair on the patio and if you get runs, dull spots, who cares, but most are usually given close scrutiny by other modelers, and I would like my models to stand the test of other. Last, I would like to say 80% of models are painted with Rust-Oleum X2 paints, I still use the air brush on colors that I need special colors and some striping. One last thing, using spray cans paint no two color and paints spray the same, each time to spray don’t expect all paint to flow and dry the same. Practice and years of painting has taught me a lot and each time I paint I pick up something new. Note, I use only Enamel paints, Testors Enamels in the hobby colors when I need a special color, that water base stuff is too hard to work with and doesn’t give good results, good for brush painting.