The quality of any surface is the result of using the right abrasive for processing along with separate tumbling equipment. In wet tumbling, a mixture of filler, water and compound is usually used. Due to this, the maximum grinding effect is maintained throughout the entire processing cycle and preventing the clogging of the gap in the bowl with abrasive. Dry finishing is therefore mainly used for polishing. Here, a polishing paste or powder adheres to the polishing medium. The motion generated in the mass finishing process causes friction between the medium and the workpiece,  thereby removing material stock and giving a a highly polished surface.
ERBA offers a range of materials for surface treatment:

- ceramic media
- plastic media
- stainless steel materials
- polishing paste
- polishing powder
- granulates of plant origin
- compounds
Proper abrasive and processing method should be selected individually for each type of parts.