The putty is for filling small gaps, according to the label, but I have used it to mold small parts and add detail to existing parts. Usually I build the putty up in layers, let it dry, sand and shape, then add another thin layer if needed. Once the desired shape is obtained, then the paint seems to soak into the bare putty, giving it strength and allowing a final sanding to a very smooth finish.

The putty will dry out on you quickly at the top of the tube and in the cap. When unstopping the neck of the tube, one has to make sure all the hardened pieces are removed or you will get streaked applications when trying to create a smooth surface.