Okay, here's the deal. IF your fender is metallic, you're never going to match it. Metallic takes certain spraying technique, especially if it is a lighter or more opaque color. any sag, drip, or run will be a much darker color. any uneven overlap will leave a tiger stripe. Anything else will dick it ALL up. I hate metallic. The gun is fine, hvlp is nice, but really has absolutely nothing to do with painting a car. It puts more paint on , with less pressure, so less gets in the air, resulting in paint savings. Tens of thousands of cars have been painted with a gun just like yours. A quart of color is certainly more than enough, especially when reduced. There are lots of good books out there on auto painting, I reccomend you check into it. Might save you some (expensive) paint.