If the colors work out... (limited color selection) Towerkote over Monokote. Its lighter, cheaper and works at a lower temp, which creates less gassing.

You have to be sure you've properly shrunk the Monokote before layering this way... Towerkote melts at the shrink temp for Monokote. It will take enough heat to reshrink minor wrinkles from Monokote... but you'll be constantly reshrinking, because if you don't heat Monokote enough, thats when it will sag in the car.

I avoid the pin-***** method. I've seen too many planes done this way where you can see all the pinhole locations through the second color... VERY bad effect. Better to put the second color on at the minimal temp to make it tack down smoothly, then just go around the edges to seal them. (that's close to how the ARF's are done... they often skip the sealing step though...)