I have been using Testors, both the acrylic and the enamel.  The wavy line at the top of the vertical stabilizer is partially my fault, but the paint played a role because some of it pulled up.  When it pulls up after curing for a week, then I think I can blame the paint.  Both the acrylic and the enamel have done this to me.  I do not thin the acrylics when using the air brush, they spray fine without thinning.  The enamels however need to be thinned. 

The astronaut was painted with Tamiya, that is what I want to try next, mainly because I can now get it at a LHS.  (We got a new one in town!!) 

I have been watching Dreamknights videos on airbrushing and he answered one of my problems I have been having in his series.  (Orange peel)  This problem is from keeping the air brush too far from the model when painting.  I do not always have this problem, so I can't blame this on the paint pull up.  I have also cleaned the models really well before paint.  One I scrubbed with ajax cleanser.