Hello Rehab
there is no need to change airbrushes unless you want a more finer line, a .5 will give you a nice spray pattern when fully open,and a fine line when partally open, but for very fine detail you will find it hard, but with the right control and the right paint mixture its not imp
ossible to get a very fine line out of a .5 needle nozzel. but its more how the airbrush has been set up which will make the difference,ie .5 is set up for airbrushing larger projects, .3 medium to small projects. .2 and smaller for fine detail.
its also about how :you: can control the airbrush.. the more control you have the better the results.
i hope this helps
any question email me
kickasskustom@yahoo.com.au
if i can help i will
cheers
todd
kick ass kustom