You make it sound as if all FOs accelerate. They don’t. Some even slow trace. A lot of people on the forum add FOs to the oils early on so you can control emulsion/trace better. Once emulsion is reached you don’t have to go further adding FOs.
Also the FO is well mixed in so it doesn’t leak out or form oily patches that a few people who add the FO at trace experience.
Sorry, didn't mean to insinuate that. I generally add mine to the whole pot of batter, while other times I add it to my individual containers--when I'm attempting to make the teardrop design. This design I'm working towards getting a perfect teardrop all the way across my loaf mold. I found that adding it as I usually do (to the whole mix) I end up with batter too thick to pour down the sides of my mold simultaneously. While the two containers I'm pouring down the length's edges is still fluid enough for other designs, it's not fluid enough to move the colors I've laid down for the teardrop. I then end up with a campfire look rather than the rounded bottom with a nice thin tail upward. The second try I planned "not" scent the two containers for my side pour but forgot so, once again, I got the campfire (lol) again. The 3rd and 4th attempt I did remember to wait and got good results--a teardrop, yeay!!
True, most times adding and combining my FO to the whole container of batter works best for me. In 'some' instances, however, ('possibly' due to the FO I'm using) it works best if added and well blended to my containers right b/4 I use them.
I have also noticed that a couple of my FOs actually thinned my batter so I make notes of this in on my recipe for future purposes. I should make a small amount of soap with all my FO so I see how each will affect my soap batter but I don't; instead, I have a plan B in case things don't go as planned. In 3 years, I've only had to use my plan B twice. I like the Bramble Berry site as they give good details about their FOs, other sites that don't have a comment section that helps with how things worked out for those using them....but sometimes there are different outcomes regarding the very same FO.
I hope (@penelopejane) I've clarified my comment well enough not to throw others off with what I stated. I have even added my FO to my oils (b/4 the lye) as I've seen others do on Youtube. Sadly, with the two times I did this I didn't have a good outcome; but, it could have been my recipe--there are so many variables that can affect soap making.