Industrial finishing

Polishing of metal parts

We work the surface finish to reduce marks, improve appearance and leave parts ready for end use or further treatment.

Visual finish · Surface preparation

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What is polishing?

Polishing works on the surface of the finished part: it evens out the texture, reduces process marks and, where required, blends weld beads until the joint is no longer visible.

It is the process that decides how the finished part looks. On visible components — especially stainless steel — perceived quality depends largely on this final step.

It is also used as preparation: a uniform, polished surface is a better base for a coating or subsequent treatment.

Materials and thicknesses for polishing

Metals and sheet thicknesses we work with as standard. If your industrial project needs a material that is not in the table, say so in your enquiry and our engineering office will confirm whether we can handle it.

This service works with the same materials and thicknesses as the rest of the plant. The full table is on the Sheet metal laser cutting page.

CAD file formats accepted for quoting

  • DXF
  • DWG
  • STEP / STP
  • PDF
  • STL
  • IGS / IGES
  • PNG
  • JPG

With DXF, DWG or STEP we work straight from your file geometry: no need to redraw the part, and the quote comes back sooner.

We do more than check the drawing: we advise you on nesting (how the sheet is used) so you get the lowest possible price per part before anything is cut.

How our engineering office works

If you would rather not fill in the form, send the drawing straight to cata@catagermans.com.

Confidential handling. Your drawings are only used to prepare the technical assessment and are not shared with third parties. If you need a signed non-disclosure agreement, send it over.

Technical capabilities for polishing

Technical capabilities for polishing
Purpose Even out the surface, reduce marks and blend weld beads
Typical materials Stainless steel and the other metals we work with
Use Final finish or preparation before coating

Applications and types of custom metal parts

  • Visible stainless steel parts.
  • Blending weld beads on assemblies.
  • Evening out the surface before a treatment.
  • Improving the appearance of finished product.

Sectors we manufacture for

We manufacture for industrial companies across very different sectors. These are some of the most common ones, but not the only ones: if yours is not listed, tell us about the part and we will confirm whether we can make it.

  • Automotive
  • Food industry (stainless steel)
  • Agricultural machinery
  • Construction
  • Steel structures
  • Energy
  • Street furniture

Why work with Catà Germans

Every process under one roof
Cutting, forming, machining, welding and finishing in the same plant. We handle the whole logistics side so you receive the parts palletised and protected at your own factory, anywhere in Catalonia and the surrounding area, on the agreed lead time.
In-house engineering office
We review the drawing before manufacturing and prepare production from CAD/CAM. If something does not add up, we ask you instead of interpreting it ourselves. And if what you have is a sketch or a question, we will help with that too: advice is part of the service.
From drawing to finished product
Some finishes, such as painting or zinc plating, are done with specialist workshops. We handle the coordination and deliver with our own fleet: a single order and a part ready to fit.
Raw material in stock
We keep sheet and tube permanently in stock, so many standard jobs can start without waiting for material.
Over 65 years of the trade
A family business founded in 1958, specialised in industrial subcontracting of metal parts. You deal directly with the people who make the part.

All metal manufacturing services

Frequently asked questions

01Polishing

What does polishing do to a metal part?

It works on the surface once the part has been made: it evens out the texture, reduces process marks and, where needed, blends weld seams until the joint is no longer visible.

Why does it matter for stainless steel?

Because it is the step that decides how the finished part looks. On visible components, the perceived quality of the whole assembly depends largely on this final step.

Which materials do you polish?

Mainly stainless steel, and also other metals we work with in the plant.

02Welds and visible parts

Can you make the weld invisible?

On many parts, yes, by planning the welding process and the polishing together. The result depends on the material, the geometry and the finish required; we assess it from the drawing.

Which parts is it used for?

  • Visible stainless steel parts
  • Blending weld seams on assemblies
  • Evening out the surface before a treatment
  • Improving the appearance of finished products

03Finishes and treatments

Which finish grades do you offer?

If your project calls for a specific finish, state it in your request and we will confirm whether we can achieve it.

Is polishing compatible with painting afterwards?

Yes, and it is often the step before: a polished, even surface is a better base for a coating. Tell us which later treatment the part will have.

How is it different from vibratory finishing?

Vibratory finishing treats whole batches and works on edges and burrs across the part; polishing is finishing work on the visible surface, with a more demanding cosmetic goal.

04Engineering office and confidentiality

Are my drawings treated confidentially?

Yes. Drawings are used only to prepare the technical assessment and are not shared with third parties. If you need a signed confidentiality agreement, you can send it to us.

What if I only have a sketch or a technical question?

Send us a dimensioned sketch or tell us what you need. Our engineering office reviews it, asks whatever it needs to and, if necessary, helps you define the part: advice is part of the service, for metalworkers and small workshops too.

05Process, lead times and delivery

What happens after I send my request?

  • Enquiry: you send the drawing, material, thickness, quantity and deadline
  • Review by our engineering office and manufacturing plan
  • Quote and confirmation, with alternatives where there are any
  • Manufacturing within the same plant
  • Inspection, packing and delivery

What lead time does a polishing order have?

It depends on the part, the quantity and the other processes involved. In the quote request you can choose a 24/48 h urgent service (with a surcharge), about one week, a flexible deadline or a specific date, and we confirm it with the quote.

Can you deliver the parts to our factory?

Yes, with our own fleet. We prepare the load and deliver the parts palletised and protected to the agreed point. We usually serve the provinces of Tarragona and Barcelona, and look at other destinations case by case.

06Sectors and experience

Which sectors do you provide polishing for?

We manufacture for industrial companies in very different sectors. Some of the most common:

  • Automotive
  • Food industry (stainless steel)
  • Agricultural machinery
  • Construction
  • Structural steelwork
  • Energy
  • Street furniture

It is especially relevant in the food sector (stainless steel) and for visible items such as street furniture. If your sector is not listed, tell us about the part and we will confirm whether we can make it.

Why choose Catà Germans for polishing?

We are a family company founded in 1958, with more than 65 years in industrial subcontracting of metal parts.

  • Every process under one roof: cutting, forming, machining, welding and finishing
  • Our own engineering office, which reviews the drawing before manufacturing
  • Direct contact with the people who make the part
  • One order and one point of contact, right through to delivery

07Quotes, files and orders

Which file formats do you accept?

We accept PDF, DXF, DWG, STEP/STP, STL, IGS/IGES and also PNG or JPG images. If you do not have a final drawing yet, send us a dimensioned sketch and we will review it all the same.

Do you make one-off parts or only production runs?

We handle one-off parts and prototypes as well as small, medium and large batches and repeat production. You can specify this in the quote request.

How quickly do you reply to an enquiry?

We send the technical response as soon as possible once we have the drawing and the part details.

Do you offer painting, zinc plating or other surface finishes?

You can include them in the order. These finishes are carried out with specialist workshops we work with regularly, but we handle the coordination and the transport: you place a single order and receive the finished part.

Can I combine several processes in one part?

Yes — that is the normal way we work. A part can go through laser cutting, bending, welding and finishing inside the same plant, under a single order and a single point of contact.

Let's begin

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