Помогите плиз перевести слово "зачистка" в следующем контексте:

Зачистки по уголкам и кромкам лопаток

Смотрела варианты перевода, их очень много, и я затрудняюсь выбрать нужный.

General term for a metal filing method to reсontour damaged compressor and turbine airfoils back to an aerodynamic shape after incurring erosion or impact damage to their surface. A typical blend will have a length to depth ratio of approximately four to one. Blending may be thought of as completed in the following steps: 1) Dressing - by cropping, which involves cutting off material if necessary, or scalloping, which involves filing to a saddle or dished-out shape. 2) Fine Filing - to smooth out dressing scores and radiusing of edges. 3) Polishing - to restore the original surface.