"small imperfections" is correct and usable in written English.
You can use it to refer to slight flaws or blemishes that are insignificant. For example, "The old painting had some small imperfections, but I still thought it was beautiful."
The small imperfections did not matter; the genuineness of the effort did.
With 12 hour coverage, it can be used for small imperfections, or across the whole face like a foundation.
Because of their superior brain wiring, Zeitels says, singers adapt to small imperfections in a vocal cord, subconsciously retraining themselves to "sing around" lesions.
("It was during this time of close scrutiny that he began to detect certain small imperfections in his bride-to-be").
The concrete looks fresh, although small imperfections in the surface make some of the books look used, the edges of the pages discoloured or speckled with age.
Mr. Coast and many builders embrace the small imperfections that are less likely to be spotted in mass-produced machine-built bikes.
Nevertheless, this small imperfection should not prevent the project from going further.
The effect of small imperfection on the natural frequencies of the rotating ring is also considered.
However, in some cases, like in the cathode lens between the sample and the objective lens in the photoemission electron microscope, even a small imperfection can impair the resolution significantly.
There are too many perfect windows to allow for an examination of individual cases of small imperfection, but we can examine those windows of highest imperfection.
In order to induce buckling, i.e. deviation from the trivial equilibrium path, a small imperfection needs to be introduced in the computational model.
