Is the centari paint you have single stage (direct gloss) or 2 stage (base/clear) I'm not to highly familiar with DuPont, they do have both types in the centari line I beleive. If its a single stage you will be able to see all of your mistakes better to its direct gloss formula. If you can perfect painting with it, base/clear will be a cinch.
When painting a car it is very importanmt to know what the paint is on the car(laquer, enamel, urethane etc.), if you don't, stripping completely is safest. You absolutly cannot apply laquer over enamel, but vise versa is alright (enamel over laquer)
Look in the HR.com Knowledge Base exsterior section for painting tips as well as other body tips. If you have any more questions feel free to ask.