Painting a Mammoth Resin model

The Mammoth Resin page says that i.Materialize will spray paint a model on one side (A-side). I am not familiar with the term A-side. What does that mean? Is anything else done to the model prior to painting it? For example, sanding it?

Most models have two sides. The side that will stay visible is called the A-side. If it’s a round model the complete outer wall is considered to be the A-side. If there could be any doubt about what is the A-side of the part, it’s advisable to mention this clearly in the remarks of your order.

When you choose the finish “Spray-paint A-side” there is indeed extra sandblasting foreseen on the model and this means that building layers will not be visible anymore. Kind regards Lizy