Cindy...Look at page three in my Gallery and I have about 4 pics of air line schematics. Although none for two story. Also notice on the following that the oiler is used for the air tools on outlet #2 and not for painting. You DO NOT want an oiler in the line for any paint equipment or you will be asking for trouble. Here is a pic that came from this site http://www.oldsmobility.com/air-compressor-piping.htm
You may want to check it out for the complete artice that was written up about piping layout.