I'm 3D Printing a set of Dash Panels with Gauges

I don't want to derail your thread but if you could briefly explain the support material you are discussing I'd appreciate it. I'm familiar with the results of several types of 3D printing from prototypes at work but I've not heard of this support material. Is it something you are feeding in addition to the base material and it provides structural support somehow? Is it an additional option I need to look for on the machine I buy or can any one be adapted? I'm retiring in a few weeks and the first purchase will be a decent 3D printer and then I'm converting my milling machine to CNC. I have a lot of ideas to play with for car parts.