have finished the putty process, leave the plane to rest for one night
(this will allow the putty to dry) and then we can prime the plane.
Before we start priming the plane, get some warm water, soap and a
tooth brush and use it to get rid of the remaining putty, plastic,
dust, dirt and grease that could be on the surface.
dry off the model, in order not to break anything or ruin the putty.
Let it dry for a long time, so that there is not a single drop of
water inside, as if it is not dry the water may come out and smudge