I have the Honda factory finish that is a black pearl. I ran across the matching color code in the Plasti-kote Import Color spray cans. Duplicolor also has factory colors, just not mine.
I had also considered Maaco, but read online that their cheaper paint job is really not going to last long and is suited to people who sell and it becomes someone else's problem. I think their business plan is to bring you in with dreams of the $399 and tell you why it sucks and it should really be $1200. You also deal with whoever works there today, as opposed to a mom and pop shop that has to build business with great work and word of mouth advertising.
I had talked to a local body shop that did excellent work on my wife's van after an accident and he quoted me $700 to spray the roof and trunk. I have no doubt that they would do a perfect and lasting finish. Since considering this I have noticed the problem on the hood is starting. I think that would double the area I need refinsihed and possibly the cost.
Since I only paid $500 for the car and it is no gem... I decided to try and tackle this myself. Plasti-kote's paint is a laquer so it goes on better, and I believe subsequent coats loosen up the previous coat and makes the finish melt together. They recommend using their clear coat spray. They admit that it is not very resistent to gasoline and other chemicals. My plan is to give it a try in several areas like my bumpers to check for ease of use, color and durability.
I read an interesting post on the different types of paints, laquers, enamels and acrylics. It was by people who paint plastic models, but the information was good and they actually use some of these spray. It talks about the solvents and compatibility of differnet paints as topcoats over other types of paints.
http://www.rcboataholic.com/faq/painting.htm
so in the end, if I spray my color coat with plasti-kote, I need to follow up with their clear. It is not as durable or resistant to chemicals as a two part clear like you are considering. I think some duplicolor paints might allow a two part clear. my limitation is the availablilty of a matching color. You may want to check out duplicolors web site and their videos. Apparently people have painted entire cars with that brand of spray.