Ive not used Aura before - but the Color Stories color I want for my ceiings throughout the house only comes in that (Crisp Linen ). It looks like a nice warm true white. I have a sample pint and it seems to stiffen up pretty fast. Will I be able to throw in some Mixol tints if I want to? I have this ongoing problem in my house that a lot of white or yellow paint colors seem to take on this evil greenish tinge for some unknown reason, and the only cure is to throw in a slight amount of red tint to neutralize it. Can I do this kind of futzing with Aura, or will it stiffen up on me if I try to stir in another tint?