Do you have to reduce an all over Auto Air paint job?

I am going to paint a whole car with an Auto Air candy water based paint. I have airbrushed in small amounts with this paint before and I haven't had to reduce it. Because I'm doing a whole car this time, do I need to reduce?Do you have to reduce an all over Auto Air paint job?
yes you do,,you cant spray the paint the way it is,,it may be to thick,but all that i have ever painted with has to be reduced,,usually 1 part thinner and 2 parts paint,along with the hardener,,good luck hope this help,s.