How to Polish Airbrush Needle?

Hi everyone! I’ve been working on some improvements for my needles lately. Well – not really improvements but let’s say maintenance. The thing is, even if you belong to group of people that never done such a thing as polishing the needles, behold! Trust me – one day you will have to do it anyway.
Preparing Surfaces for Airbrushing – part 1
When painting anything in any way (regular brush, spray nor airbrush) you have to follow certain rules to keep your art look great as long as possible. The process depends on used material surface. Wood, paper, textile, plastic, leather, rubber, metal, etc. All of these materials need special approach to preparation. Some of the preparation methods are easy to follow and don’t require much time to get us ready and some are more difficult and take probably more time than painting itself.