Duplicolor or Summit paint?

The problem with the Duplicolor paint is its a pain to cover with it and with the cost of buying the Duplicolor(I was told for my Duster,4-5 quarts color 6 coats clear) you could easily buy a good urethane base/clear system .The Duplicolor clear isnt very durable, and if you spill gas on it,it will ruin it.It comes out dull after it dries,you can buff it,but after sitting in the elements for awhile,it will start to dull out again.