Making mottled candles the way you like them to look is a process of experimentation. What you want is to load the wax with your fragrance (or mottling oil) so that it can't all be held in the wax. The oil seeps out causing a mottled look. The more steric you add, the less mottling you will get because steric helps bind the oil in the wax. Also different fragrances will mottle less, some alot. So some mottle well with 1/2 to 1 0z. pp. Some people have used 1/2 tsp with this wax and some use only the wax, color and UV. HTH. Hope someone else chimes in here, because there are some members who make stunning mottled candles.