Ya think? I know that! I was just using that as an example to be more lucid as to what I was looking for.
After reading following post here, I became interested
For an airbrush:
1. Go to the plugin section and download Sabrown100's Custom Brush plugin. (It's stickied)
2. Find the "Share Your Custom Brushes here" and look for usedHONDA's post on the first page. After running the Brush plugin once, download usedHONDA's brush and extract it to My Documents\Paint.NET User Files\Custom Brushes. Restart Paint.NET, run the plugin, and on the left pane, there should be an airbrush. Enjoi.
The above ^ info came from this link:
http://forums.getpaint.net/index.php?/topic/8928-air-brush-and-spray-paint-effects/
When you scroll down (link above), you will notice that some one else was looking for the same thing which subsequently developed into futher dialog
which reveled a name (UsedHonda) that had developed such a thig and where one could get this.
At this point, it looks like either no such thing exists or if it did, it was pulled as it was an old post "2008"