Well that just opened up a whole new load of questions for me LOL.
Is it possible to use scraps from different recipes?
What about all the different fragrances?
How would you label them if they are all different recipes? Oh maybe they would just be for personal use...
You can use scraps from different recipes. Most of the time it seems that fragrances end up going well together. Otherwise, keep the scraps separated by fragrances that do work together. If you add fragrance to the new soap part, that will be the dominant scent in the finished soap anyway. As to labeling - I can't really advise, but I would think you'd need to list all ingredients if you were to sell them.