This workflow describes local low-temperature polishing with LUXI Purple and a clean bristle brush in relief, recesses, undercuts, inside angles, narrow brush-accessible channels, areas below settings, filigree, and spaces between elements. It is a separate brush branch: cotton thread and cotton cord are handled in another workflow.

When to use it

Use this route when a normal polishing wheel cannot reach the target zone or begins to over-polish raised details before it works the recess.

Select LUXI Purple primarily by geometry, access, and the bristle-brush contact, not by one universal material name. The material, item construction, inserts, settings, joints, and surface condition must allow mechanical polishing with the selected brush.

Before local work, complete:

  • item geometry;
  • required repair;
  • abrasive preparation of the target zone;
  • the main first stage on accessible open surfaces.

LUXI Purple does not replace sanding, repair, or polishing of the whole open surface.

Brush selection

Use a clean bristle brush whose size, form, and stiffness reach the target zone without smoothing raised details, edges, or fine relief.

No universal bristle material, brush model, bristle length, working diameter, or rpm range is prescribed. For a powered brush, consider actual diameter, linear surface speed, contact area, rotational stability, rpm drop under load, and surface temperature.

This workflow does not prescribe a metal wire brush.

Do not use LUXI Purple on felt tools, muslin wheels, stitched or unstitched cotton wheels, cotton wraps, or other dense or continuous polishing bodies. Use the separate LUXI Green route for small cotton and felt tools.

Applying LUXI Purple

Apply enough compound to remain on the bristles and travel into the working zone, but do not overload the brush.

Excess compound fills the relief, smears, separates the bristles from direct surface contact, leaves the zone hazy, and makes cleaning more difficult. Too little compound falls away, does not remain on the bristles, or fails to reach the working zone.

If the brush is contaminated with old compound, removed material, or other contamination, stop and restore a clean working condition.

Local polishing

Use short repeatable passes with light controlled pressure. Do not increase pressure automatically and do not extend continuous contact. Between passes, clean the zone, allow it to cool, and inspect it under directed light and magnification.

The brush must reach the working surface inside the zone without smoothing surrounding edges, raised details, filigree, or fine relief.

Two conditional roles

When visible marks from the last abrasive remain in the zone and a normal wheel cannot gain access, LUXI Purple may perform a local first stage. That stage is complete only when the marks are fully removed while edges and fine relief remain intact.

When the first stage in the zone is already complete, LUXI Purple may perform a local finish. After cleaning, the surface must be even, have the required lustre, contain no matte areas, and preserve edges and fine relief.

Both roles depend on the entry condition of the specific zone. Neither is a universal role of LUXI Purple for every task.

If the result is insufficient

First clean the zone and confirm that preparation is complete. Then check, one variable at a time:

  • whether the brush reaches the target surface;
  • whether its size, form, and stiffness match the geometry;
  • bristle condition and cleanliness;
  • actual linear surface speed and rpm under load;
  • local pressure;
  • the amount of LUXI Purple and its retention on the bristles;
  • contact duration;
  • temperature;
  • completeness of cleaning and inspection.

Do not automatically add more LUXI Purple, increase pressure, or extend continuous contact.

LUXI Asian Blue belongs to a separate, more active local correction with a short stiff brush. It is not an automatic next stage when LUXI Purple appears slow.

Stop conditions

Stop if:

  • the brush smooths edges, raised details, or fine relief;
  • contact becomes unstable;
  • the bristles become damaged or loaded;
  • LUXI Purple no longer remains on the bristles;
  • the working zone becomes filled with compound;
  • the surface becomes noticeably hot;
  • haze remains or increases after cleaning;
  • cracks, cavities, or pores open or grow;
  • the result remains unstable after cooling and cleaning.

These conditions require correction of the cause, a return to preparation or repair, or production-suitability assessment rather than an automatic increase in pressure, compound, or contact time.

Cleaning and coatings

After polishing, remove LUXI Purple and removed material completely, then dry, cool, and inspect the zone under directed light and magnification.

Select the cleaning method for the whole item: material, construction, inserts, joints, coating, and next operation. LUXI iClean, ultrasonic cleaning, heated solution, solvent, and steam are not prescribed automatically.

Do not mechanically polish a thin decorative, protective, electroplated, or PVD coating that must be preserved. Identify an unknown coating first.