I can see both sides of the argument, clears are more prone to failure but are great if you need to buff out dirt without disturbing the flake. I've put down some really nice single stage paints that lasted years and kept their shine. If your a beginner I'd recommend base coat clear coat just for it's forgiveness. The base dries so fast that you can literally sand out a blemish in just minutes after application and go back to spraying then if you lay down some nasty orange peal or get dirt in it just throw on an extra coat of clear and buff away. I like both but had longer lasting results with single stage but always used a hardner. The trick to getting the clear to really hold is not applying to late when the base is cured and use good quality clear.