Polishing

Polishing Compounds and Equipment

Polishing produces the high-quality surface finish that takes a workpiece from "machined" to "finished" — the mirror-bright stainless on a food processing tank, the satin-smooth surface on a brass fitting, the polished aluminium on a finished casting. AIMS Industrial supplies polishing compounds, mops, wheels, and equipment for metal finishing in fabrication shops, restoration workshops, and industrial finishing applications.

The polishing categories we stock

• Polishing compounds (bars and pastes) — abrasive compounds graded by aggressiveness for cutting, fining, and finishing
• Polishing mops — fabric mops in various weave densities and configurations for different stages of polishing
• Polishing wheels — felt, sisal, and cotton wheels for bench-mount polishing machines
• Buffing compounds — final-stage compounds for the highest mirror finishes
• Polishing equipment — bench polishers, hand-held polishers, and accessories
• Workpiece holders and fixtures — for safely holding parts during polishing

The polishing sequence — coarse to fine

Quality polishing follows a sequence: coarse cutting (removes machining marks and scratches), medium fining (smooths the cutting marks), and fine finishing (produces the final mirror-bright or satin finish). Skipping stages produces poor results — going straight from coarse to fine leaves visible scratch marks under the final finish. Each stage uses a progressively finer compound and a different mop or wheel, with thorough cleaning between stages to prevent contamination from coarser compound.

Compound selection by metal

• Steel and stainless steel — coarse compounds (emery, sisal-loaded) for cutting; greaseless compounds for fining; final buffing compounds for mirror finish
• Aluminium — softer compounds throughout the sequence; aluminium loads onto mops easily and requires frequent mop dressing
• Brass and copper — traditional brown compounds for cutting and fining; rouge for final mirror finish
• Plastic and acrylic — specialised plastic polishing compounds; metal compounds damage plastic surfaces

Mop selection

Polishing mops are made from cotton, sisal, felt, or specialty fabrics, with weave density and stitching pattern affecting how aggressively they cut and how the compound is held. Stiffer, denser mops cut more aggressively and suit the coarse stages; softer, looser mops suit the fining and finishing stages. Most workshops keep separate mops for each compound to prevent cross-contamination.

Bench polisher selection

For light workshop polishing, a 6-8 inch bench polisher handles the everyday work — single-speed motors are common, with variable speed offering more control for delicate finishes. For heavier work, larger 10-12 inch machines with more powerful motors handle bigger workpieces and more aggressive cutting. Spindle thread is typically left- and right-hand on the two ends, so mops can be threaded onto either spindle.

Working safely

Polishing produces fine dust and metal debris that can be hazardous — particularly aluminium and beryllium-containing alloys. Use proper dust extraction, wear eye protection (mops can throw debris), and don't wear loose clothing or jewellery near rotating mops. Hold work firmly — workpieces caught by mops are thrown with significant force.

Need help speccing polishing compounds and mops for a specific finishing job? contact our team — we'll work through the metal type, finish required, and equipment available.