For re-working an old painting I typically choose Neo Megilp Painting Medium. First is the therapeutic motion of placing a thin layer into the areas I desire a transparent glaze. Next is the action of gradually adding color to the brush and then work subtle transitions of pigment. This week I was working in a jewel tone spectrum over an under-painting that was dominate with warm cobalt teals. The dueling of warm vs cool adds a dimension that was missing before.
Plus hints of Radiant Magenta, Radiant Turquoise + Phthalo Turquoise