I am considering painting my 30 Model A streetrod myself and the spraygun I am considering buying is a Iwata. Basically because it is not an air hog and My compressor will handle it. The question is, can I paint the car BC/CC with the Iwata300-134LV? It is a ltttle smaller than the Iwata400. Should I use the 1.3 or the 1.4 tip Also and they speak of paint cap,I am not sure what they are referring to. Can someone shed some light? thanks, great site!