Prepare to spend lots of money! If your a perfectionist like I am, you will go through slabs of wax and ingredients trying to get it perfect. When you get it right, it is relieving and rewarding at the same time! If you're going to use a straight paraffin, I would recommend using vybar to allow your wax to absorb more fragrance. Just don't overdo it, as you can "lock" the scent up. Maybe 1/2 teaspoon per pound, no more. Petro will give better glass adhesion and give you a slightly quicker melt pool. Excessive petro will cause smoking. Coconut oil is one of those things that may help increase your scent throw. There are a lot of mixed reviews, and I tend to think a little c.o. does help; it seems to give a better cold throw in my opinion. Adding a little soy seems to help "tame the flame" and slower the burn depending on the soy wax. Beeswax is nice, as it ionizes the air, but it's just too expensive, and your profit margin could take a hit in this economy. Crisco was originally made to create candles! Crisco is hydrogenated oil, so keep that in mind as it will up the oil content in your wax formula. Haven't tried microcrystalline wax, but I know it can vary from taffy soft to hard as a tabletop. Good Luck! Hope this helps!