|Technically, a nice photograph. Good DoF and exposure.
The composition, for me, has one major problem, The eye is automatically drawn to the pont of highest contrast; in this image, the specular lights against the dark handle at the top of the image. Attention is then drawn to the paint smudges on the handle and then out of then out of the image.
There's an opportunity to place interesting highlights in the metal part of the brush, and make it the attention grabber in the image. A second flash focussed on the metal with a stop more light, or white reflectors placed to add more light to the metal.
Eliminate any specular lights near the edges of the image. They draw attention away from the image.
Just my opinions.