I use CP, and it really depends on what thread you are using and what CP you use to determine how many coats. Back when I was experimenting with Sulky 40, it would take very intensive packing and many coats (up to 6) of flexcoat CP before the finish to get decent results. I've gone back to Gudebrod thead or Sulky metallics only now, and I've switched to Gudebrod 811 CP. It seems to preserve the original color of the thread without darkening it. And I only use 1 or 2 coats of CP now.