When I do CPOP, I put my soap in the oven at 170 for 1 hour and turn off the oven. I have an electric oven so when it starts to cool down I move my mold to the laundry room and put it in a bed of towels. I put plastic wrap over the top when I put it in the oven, but it does get a bubbly (very small) top to it. I really like that the soap is ready in two weeks after curing, but the top is a little distracting. I did it with Drakkar scent and a black with white swirl. It looked cooler with the bubbly top, so I left it. If I do something fancy, I try to just to it CP and let it rest for the longer time, it looks prettier. Here's a photo of the soap, notice the top is a little grainy looking. I just hate cutting the swirl pattern off the top. Good luck.