Tom,I don't know why that happens but it seems like I see it a lot.Some stuff with the best,and most careful prep seems to fall apart and sometimes slapped together jobs hold up forever.In the early summer of 81 some friends tracked me down at 10 PM on a Friday night.They had a new 81 Peterbilt ready to paint,but the painter had gotten hung up 1200 miles away and wasn't going to make it.Truck was stripped of chrome,sanded and taped,ready to go except for a painter.I started mixing and painting.A long nose Pete with a five foot bunk takes a long time to get around.They had persuaded me to paint by stocking up on beer.I got done around 5 AM,and went out to climb into and old truck sleeper to take a nap.At 10 I got up and went into the garage where they were stripping the tape and putting the chrome back on.That truck was one of the shiniest things I had ever seen.That single stage black urethane (Imron) was just beautiful.I had a beer about every three cups of paint,about one an hour,so I was relaxed,not tensed up.I used a Sharpe 75 gun with a regulator on the gun.I would change pressures constantly depending on what I was shooting.The sheet metal expanses got a lot different patterns and pressures than the suspension and axles did.I looked at that truck last summer,it has 3.3 million miles on that paint job.The fronts of the fenders,air filters,front of the roof,and corners of the sleeper are all wind eroded,but nothing has peeled.That truck just hauled electronics from Mexico to Boston all it's life,35 trips a year going from extreme heat to extreme cold a lot of the time.That was a lot to expect for that paint job.