Symptoms Brush appears clean or dry immediately after charging.Recess contact happens, but the surface does not brighten.
Likely causes The brush is too stiff, too dirty or not holding compound.The contact zone does not generate enough working heat for standard polishing-paste behaviour.Too much pressure may push compound away instead of transferring it.
Checks Check whether compound remains on the bristles after a short pass.Check whether a lighter charge transfers better.Compare with LUXI Purple behaviour on the same brush.
Recommended fixes Clean the brush and apply less compound.Use LUXI Purple as the primary brush-route compound.Use shorter passes and lighter pressure.If the recess remains rough rather than just dull, consider whether a short stiff brush route is required.
Prevention Develop brush routes separately from standard wheel routes.Record brush type, compound amount and contact behaviour.
Recommended workflows Brush polishing for relief and recessesPorous castings from 3D prototypes — surface polishing with LUXILUXI Purple for brushes, cord, thread, relief and recessesChoosing LUXI Green or LUXI Purple
Understand the cause Brush, Thread and Small Tool LogicWheel diameter, rpm and linear speed in the contact zone