Polisher (Jewelry & Watches) interview questions and expert answers

Answer example: This scenario requires extreme caution because improper polishing can significantly decrease the watch's value. The Nautilus case design combines mirror-polished surfaces with brushed finishes, and maintaining the distinction between these surfaces is critical. I would first document the watch's condition photographically, noting which surfaces are polished versus brushed. For the scratched polished surfaces, I would use progressively finer abrasive papers starting at 600-grit, working up to 3000-grit, followed by diamond paste polishing compounds from 6-micron down to 0.25-micron. The challenge is working on polished areas without touching adjacent brushed surfaces. I would use masking tape to protect brushed sections, replacing it frequently as it collects polishing compound. For each surface transition, I would work with a tapered felt wheel that allows precision near edges. I would never use a buffing wheel on this watch—too aggressive and impossible to control near surface transitions. The entire process requires working under magnification and frequently checking my progress. The goal is removing scratches while preserving the factory geometry of the case—over-polishing rounds off edges and destroys the Nautilus's distinctive angular architecture.

Answer example: I use different techniques for each metal type. For gold, I use progressively finer abrasives and appropriate compounds. Platinum requires specific techniques due to its hardness. Silver needs careful handling to avoid over-polishing. I understand how each metal responds to polishing and adjust my methods accordingly to achieve the desired finish.

Answer example: Achieving a true mirror finish requires a methodical progression through eight to ten stages. I begin by removing any deep scratches with 320-grit sandpaper, working in one direction only. I then progress through 400, 600, 800, 1000, 1200, 2000, and finally 3000-grit papers, changing direction 90 degrees with each grit to identify when previous scratches are fully removed. After sanding, I move to mechanical polishing. I start with Tripoli compound on a firm muslin buff—this removes the sanding marks and begins developing luster. I clean the piece completely in an ultrasonic cleaner with ammonia solution to remove all compound residue, which would contaminate subsequent steps. Next I use white diamond compound on a softer buff to refine the surface further. Another thorough cleaning, then I use rouge compound (iron oxide) on a very soft, unstitched buff made of loose muslin. This stage develops the mirror finish. The key is light pressure—letting the compound do the work rather than force. Finally, I use green rouge or 0.25-micron diamond paste for the ultimate finish. Each buffing stage requires dedicated wheels—cross-contamination ruins the finish. I inspect constantly under 10x magnification. The entire process for a ring takes 45-60 minutes. Platinum requires the same progression but with harder compounds due to its density.

Answer example: Watch cases require careful attention to preserve their original design and proportions. I use appropriate tools and techniques for each case material and finish type. I maintain the case's geometric integrity while achieving the desired surface finish. I understand how different finishes like brushed, polished, or satin affect the overall appearance and value.

Answer example: Essential tools include various polishing wheels, compounds, and abrasives. I use different types of wheels for different finishes and materials. I have specialized tools for intricate work and magnification equipment for precision. I also use measuring tools to ensure I maintain proper tolerances. I maintain all equipment meticulously and understand how to use each tool effectively.

Answer example: Delicate pieces require special care and appropriate tools. I use smaller, more precise tools and work slowly and carefully. I protect areas that shouldn't be polished and use appropriate support to prevent damage. I work under magnification to ensure precision and maintain the piece's integrity throughout the polishing process.

Answer example: I can create various surface finishes including mirror polish, satin finish, brushed finish, and matte finish. Each requires specific techniques and tools. I understand how different finishes affect the appearance and value of pieces. I can also create contrast finishes where different areas have different surface treatments.

Answer example: I follow standardized procedures for each type of polishing work and maintain consistent techniques. I use templates and jigs when appropriate to ensure uniformity. I work at a steady pace that allows me to maintain quality rather than rushing. I regularly compare my work to approved samples and make adjustments as needed.

Answer example: I approach vintage pieces with respect for their historical value and original craftsmanship. I research the piece's history and understand the original finishing techniques used. I use appropriate methods and materials that match the period. I document all work thoroughly and ensure that any modifications are reversible. Preservation of historical value is as important as functional restoration.

Answer example: I study new polishing techniques and attend workshops to learn from master polishers. I examine high-quality pieces to understand different approaches and styles. I experiment with new tools and methods while respecting traditional techniques. I also follow industry publications and attend trade shows to stay informed about trends and innovations in polishing.