This is a Masking Clay. The surface would not be oily since it is aqueous-based polymer clay. There is no need to wait for the clay to dry so the surface can be painted right after. It is easy to mold, and suitable to mask uneven surfaces and create camouflage patterns. Also suitable for molding.
Used with permission, copyright 2021 Gunze Sangyo. Copyright 2021 Brey Corp. t/a Hobby Works.