I am about to undertake my year end vacation project, Leatherique rejuvinator oil treatment on my 355 crema interior. I've read the instructions on their site, will do that in heated environment, etc ... However, I am still a bit nervous at putting this oil on my white seats and getting it wrong. I searched the forum and found several examples where the rejuvinator oil is praised and the results look stunning (sometimes as a result of dying the leather, which I won't do). Any last piece of advice ?