I think I would try the PPG or BASF tech support as you might have a delamination problem with any brand paint if you were to go too far past the recoat window. Without proper prep, there is no way for the paint to properly bond (crosslink). Why are you NOT having the flames put down on the BC directly THEN fully clear coating. There are just too many paint interfaces - BC/CC/Flames=more BC/CC with another brand and the percentage potential for paint failure goes way up. Phew.