Sorry for all these noob questions but I just want to make the best out of the first model

Anyway do you guys paint the undercarriage? I am asking this because my rx7 is going black, and since the plastic is black I thought I could just keep it that colour. Or, I could just cover it with a layer of the black spraypaint, but don't know if that is really worth it
ps: tomorrow i'm putting together the rear suspension and starting on the front, w00t.