I have very mixed feelings about the Testor's One Coat paints. I bought A can of Star Spangled Blue to do this project, after the first can I had to strip and repaint the whole thing, it was WAY too thick, and would not harden and also bubbled in places like something was in the can. Stripped and shot again, this time with can B, bought at different location...Again, odd bubbling like contaminants in the can, (yes, I wash, prep, high quality prime and sand etc etc ) stripped, back to first location and bought can C........same color, ,,,decanted into airbrush jar, let gas out a few days before thinning a bit, and shot through airbrush. I had to let this thing sit for weeks before I could polish out as the paint was soft. (I live in Phoenix valley, humidity WAY not an issues either)
I like the color, but One Coat my butt.,..unless you want a thick gloopy mess that just will not harden you have to do it in layers,
I do like what I ended up with, but I will stick with my airbrush and decant when using these types of paints, but mostly automotive paints from the start will save me work., Besides, spray cans may be easier, but you will never get as thin of layers with a spray can.