Hi, im so confused about vanillin in whipped soap. Does the vanillin discolor it? Does adding mica cover up the discoloration? I want to buy a new fragrance but it has 9% vanillin in it so im a bit scared. I have a fragrance oil that has .30% vanilin that I use in my whipped soap, but I add mica so I havent noticed any discoloration. Thanks!