yep try this out ,,,, most reputable paint dealers have a spectromtoy (badly spelt) but it acurately matches paint perfectly and costs nothing except for paint ,, I would lightly sand model re undercoat in a shade lighter than top coat let dry for 24 hrs then 2 top coats most enamals now are water based and fuel proof anyway thats how I would attack this job ,,someone else may have some better info all the best mate