Karl, my post-painting routine just involves shooting some Windex through my brush. I fill the cup and clean any excess paint off the inner walls of the cup with a hairy brush, then I unlock the needle and pull it in and out a few times. I then lock it back in place and shoot the spray into a garbage bag inside a trash bin at max pressure (40psi on my compressor). Once the cup is empty, I fill again with windex and shoot that through, then once again with water. This takes maybe 2 minutes and works well over the life of one model when using Tamiya paints - the windex seems to dissolve it quite well and is non-toxic. When I start a new project, I strip the brush down and clean everything well with lacquer thinner and this time I catch the spray in a container similar to the one Mike posted.