Dupli Color is not automotive paint. It's lacquer that comes in colors to match automotive paint. Lacquer is the worst kind of paint to use on bicycles because it's not durable. Their wheel paint is acrylic enamel, so it's more durable, but the choice of colors is extremely limited. It's nowhere near as tough as real automotive paint, which uses a hardener that is mixed in before spraying.

Nothing that comes in a spray can is very durable. Either pay someone with the equipment and skill to do the job with good paint or buy the equipment and learn to do it yourself. You don't have to spend a fortune on equipment. My Sharpe hvlp detail gun originally cost $300, but I bought it used for $40 and rebuilt it with a $14 kit. You can rent or borrow a compressor. You'll need more stuff, but those two are the biggest expense.