2 months late to reply to this post... but for anyone else who might come across this...
when I worked for Nars before, they always taught to use your fingers to swipe across the top and go straight to the face OR to swipe a good amount of Copa on the back of your hand and use your fingers to warm it up, then apply.
With the consistency of it, I've also warmed it on the back of my hand and then used a synthetic foundation brush...