The mesh object for the air hockey paddle has many small faces. Even with subobject selection set, it can be tedious to select each face individually. Fortunately you can use implied windowing just as you probably do for 2D design. Since this is a 3D model, however, you might find it helpful to view the model from different angles as you select the subobjects. You can use the ViewCube to easily change to a standard viewpoint. As you pass the cursor over different areas of the ViewCube, they highlight indicating which viewpoint will be applied.
If you accidentally select unwanted subobjects, you can press the Shift key and click on the red grip of the unwanted subobject. The grip turns blue indicating that it’s cold and won’t be used in the editing operation. If your window selection missed some subobjects, you can press the CTRL key to continue adding subobjects to the selection set.
To create the finger impressions, I experimented with Move and Scale operations, relocating the gizmo to various locations. Ultimately, I decided to scale the selected faces towards the lower back of the rubber grip, making them more pronounced at the upper front. I also decided to constrain the scale operation to the YZ axis.
- Shift-pick to deselect subobjects