I use a regular brush to apply grease to the smoothed guide rods. In order not to dirty my other tools, I designed a simple cover that can be folded.
Of course, this cover can also be useful for paint brushes. Below is a link to the source model where you can customize it, shape and size.
This model does not require any special settings, more details in the attached 3MF file.
If you want to modify the model, I am attaching the STEP file and a link to my OnShape.
Current model version: V02
Please don't forget to leave a rating or a comment. I will be glad for any feedback, so I can correct any mistakes in the design. Thank you very much.
The author marked this model as their own original creation.