Yes - the first and second coats need to be a bit "tacky", but not sopping wet ! In hot or humid conditions, maybe wait 5 minutes instead of 10.

If your backglass is in great condition, you don't need the last coat. The Galaxy needed a final coat. If you have to do touch up work, you can do this after the final coat - whether that is your second or third coat, depending on the condition of the backglass art.

For the Hotdoggin, I would not bother with the third coat if the only damage is in that designated area.