I am having trouble with a painting I'm doing from a photo taken 32yrs ago.
Its nearly finished except for the hair - I'm trying to get a sheen ( shininess) to it, as at the moment it is looking dry.
Any suggestion please will be appreciated
Perhaps try the dodge & burn tool (dodge lightens and burn darkens) from your toolbox. Or, you could go to the HSV bar under (if it's not showing, it's under Windows>Color Palattes>Color Info) and shift the S(aturation) and V(alue) bars to adjust the color of the hair you're painting.