Use a small brush to touch up the paint anywhere it is uneven.
{f} improve the appearance of by making small corrections or changes, fix up; stimulate by or as if by striking
alter so as to produce a more desirable appearance; "This photograph has been retouched!"
alter so as to produce a more desirable appearance; "This photograph has been retouched!
(To) To touch a horse with a whip for greater speed To touch up a picture, etc , is to give it a few touches to improve it
Application of paint on small areas of painted surfaces to repair misses, mars, scratches and places where the coating has deteriorated, in order to restore the finish