is an adhesive component, which gives decals greater adhesion to plastic parts. It is much easier to affix decals to plastic model part where the parts either have a rough or irregular surface.
Apply a small drop of Mr. Mark Softer to the area where the decal will go using the brush attached to the bottle cap. Apply the decal over this area. Apply gentle pressure to the decal with a soft cloth, removing any excessive liquid and ensuring that the decal down fast
Mr. Setter and Mr. Softer help best on waterslides that go over curved/uneven shapes/surfaces rather than flat areas of the piece. They help the decal contour and stick to the piece well as if painted on. Its also a good idea to just go ahead and use setter and softer for all the decals you use anywhere on the kit