The main extractor is 2hp, which covers the booth and the general air in the shop. Im working on making it positive pressure as it is basically air tight when it when the doors are shut. So Im looking at installing another 2hp fan to draw air in and help push any overspray down wind to the booth.
You only really need to extract the booth area that your doing the spraying in, we normally spray in the booth then move the stuff down the shop to dry on drying racks. Also depends on what your looking to spray as heavy waterbased coatings dont take much extracting as they dont mist as much as thin laquers.
If you dont do much spraying get yourself a cheap apollo hvlp system they will spray most things to an adequate standard no need to worry about compressors and line and guns. we have one we use to paint garage doors onsite and do any finish repairs. Also there as cheap as chips on ebay, get a 3/4 stage as they extend the range of stuff you can handle. More important really is to have some spray overalls if your spraying anything with thinners in it as it will stop you stinking and also helps you keep your working area clean, filter everthing you put in your gun, thinners, paint, gunwash and buy masses of tack rags to make sure you keep your panels properly clean inbetween coats. Also keep your kit clean clean the gun properly at the end of each job and if you can afford it have a seperate gun just for clear coats.
