Using the right gun of course. I have one of the original Iwata LS-400 Super Nova guns and really like it, but some time back they started offering a new version of it and I've been wondering what improvements they have made to it. Actually, some of the improvements seem to be more to make it easier to use, but they say it is also ready to use right out of the box with all the adjustments--except air pressure--wide open all the time. They also explain the advantages of LS and the WS. The Super Nova made me a far better painter, and now I know why. They say a good painter can use any gun and get good results, but for the rest of us, there is some good info in these videos. I'm not buying the new version, but this is interesting, even info on spraying in high heat and high humidity.