Painting mediums for acrylics need to have a strong lubricating effect to help with blending. This medium has a very juicy paint-like viscosity, it will sit on the palette with the paint and should be used very generously to create a thick blanket like layer of wet paint without losing the painterly viscosity of the paint itself. Use at least one part to one part of paint, because the purpose of the Medium is to create a wet layer, ie. a blanket of wet paint, and once this is established you will not need to spritz with Unlocking Formula much or perhaps not at all, depending on the weather.
When you have finished a layer it can be dried easily by applying warmth (ie. sunlight, draft from an air conditioner or hair dryer).