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St coils for any rta are fused claptons, usually tri core claptons to push max flavour and wicking must be spot on, watch some YouTube reveiws to accomplish this Mike's Vapes or Jai Haze have the best advise on YOUTUBE
The only way to flood a top airflow is to underwick the coils or leaving it on its side for a long period of time. Irrespective of the paint colour,it's impossible to have that effect on a tank unless there are obvious machining defects noticeable on the tank itself.