> For the complete documentation index, see [llms.txt](https://ms-kb.msd.unimelb.edu.au/the-fablab/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ms-kb.msd.unimelb.edu.au/the-fablab/metal-laser-cutting/metal-laser-cutting/post-processing-metal.md).

# Post-Processing Metal

## Metal Treatment Overview

In comparison to other materials, metal requires more post-processing after it has been cut. It is important to allow time to clean up your parts if you want to achieve the best results.

* Some metals (especially mild steel) will **oxidise and rust** after cutting, or when they come into contact with the oils on your skin. We advise sealing the metal as soon as possible after the job has been processed.
* Metal cutting often leaves behind **“dross”** - melted material on the underside of the piece. These can leave sharp or undesirable edges that may need to be filed down
* In order to cut through metal, the laser cuts at a very high temperature and can often leave **heat marks.** You may want to remove these before a piece can be presented.

## Cleaning and Polishing

In regards to **dealing with rust, dross and heat marks**, all three of these things can be cleaned up by using a linisher, orbital sander or angle grinder.

* Angle grinder - used for cutting, shaping and cleaning
* Linisher - A pedestal 'sander', the linisher is used for preparing metal surfaces for welding or cleaning.
* Orbital Sander - used for cleaning and polishing 

<div align="left"><img src="/files/-M4rP0T3Ma_S7Fo4m6up" alt="Cleaning up metal parts on the Linisher"></div>

## Folding Metal

For folding sheet metal, we have the Magnabend 650E (a magnetically charged metal bending tool) available for students to use in the workshop.&#x20;

<div align="left"><img src="/files/-M54Gd2JuZG4h0hkRJ5C" alt=""></div>

## Welding

Maker Spaces Workshop has a welding bay which includes MIG, TIG and stick welding services. This is offered as a service to students, where Fab Lab and Workshop staff can weld your job for you.  Feel free to bring your welding job in and have a chat about it with Fab Lab staff.

<div align="left"><img src="/files/-M4rOFC26LKRwlTKfsMv" alt="Makerspaces Workshop Welding Bay"></div>

## Finishing

### Spray Painting

Guide on best practice for spray painting metals - Spray booth available for student use.

[**SKILL BUILDING: SPRAY PAINTING TECHNIQUES**](https://makezine.com/2015/06/24/skill-builder-spray-paint-techniques/)