I sometimes use milk paint to colour the handle of spoons. The most popular painted handle I make is a black over red combination that is then rubbed back to distress the high points, the ridges between the facets and the edges of the handle. The first batch of these I made back in 2016 at Spoonfest were very well received and dubbed lava spoons as the glowing red shows through the black and looks red hot (maybe). Anyway the name has stuck although the look of them has changed a bit as they now have stripes running along the facets on the top of the handle.