What a great first post - very tidy painting there and a great use of colour.
If I was to critique, all I could say is to watch out for the graininess (especially on KJ) - it might be from the primer, and if it is some really fine wet and dry could help reduce it (before painting of course
). If it is not the primer then try adding more water to the paint... although I suspect its the primer from looking at how super-smooth the others are!
really great stuff!