"painstakingly painted" is correct and usable in written English.
It is commonly used to describe something that has been painted with great care and attention to detail, often implying that the process was long and labor-intensive. Example: The artist spent months painstakingly painting the detailed landscape, capturing every subtle shade and texture with masterful precision.
Two painstakingly painted grains of rice.
Old-fashioned signs had to be painstakingly painted in a kind of color-by-number method.
I think of my lipstick, dark red and painstakingly painted, as a moment of perfection frozen in time.
But the Zandra Rhodes look, so painstakingly painted by her hands 40 years ago, had a futurist element here too.
In "Comma," a 1960 picture of a boy seated on a wooden crate, he painstakingly painted more than 4,000 individual bricks in the wall in the background.
For the study, which was part of his doctoral research, he painstakingly painted the flies different colors to identify the mates and their brothers and sisters.
Contrasting multicolored stripes are actually lengths of ribbons that she stapled up -- "a way of modifying a wall without permanently and painstakingly painting it".
For $1,250, plus a $200 consulting fee, Dr. Cassel sizes the customer's irises and pupils, and then painstakingly paints each iris fleck on each lens, in just the right hue to enhance skin tone, hair color, mood -- even outfit.
Instead of being restricted to painstakingly painting on a wall, an artist could carry an easel anywhere; hence, the rise of portraiture.
As you can see, Pearson painstakingly paints with real life, in real time, rather than adding in special effects later. .
Roiphe writes, "There is a photograph of the family — the two little boys in sailor suits, kneeling on the floor with a train set, Wells hovering restlessly in the doorway, and his wife slumped in a rocking chair in an unmistakable posture of defeat — that hints at a different family portrait than the one Wells so painstakingly paints".
