Paint on a new airliner is usually applied in two stages: first, a coat of primer, and then a top coat  A new process requires no primer, but instead uses two layers of the same newly developed coating, with each layer of the new coating having the same thickness and weight as a traditional top coat
Using the new process instead of the old process increases the price of a new aircraft considerably
Unlike the old process, the new process was originally invented for use on spacecraft, which are subject to extremes of temperature to which airliners are never exposed.