I will try it to make this more like a manual, but i think that are mostly usual modelling skills, the experience make the difference. That is what is needed:
To get the exact orientation of the blue painting, apply 10mm-Tamyia masking tape exactly above the lower end of the body: (Picture after painting

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The blue painting ist the last color to apply. It`s better to paint it in two steps. Little errors can be removed with the blade or a toothpick. At last (after lettering) the body should be painted with clear laquer.
To create the surface of the headlights, apply a drop Micro Crystal Klear with a toothpick. In a second step, glue the thin polystyrene glazing with the same fluid on the upper headlight: