How to repaint the strike scratch on steel surface

When we install the staircase, their may will have some scratch on surface. We use the good quality powder coating on surface, so general strike will only leave a light scratch. You could use the grinding sanding paper to erase the scratch, then using the painting spraying. When the painting is dry, will not see the scratch. To be better repaint, you could choose the matt black powder coated better than glossy color.

Below is the video, showing how to repaint the carbon steel surface, with using the painting sprayer, we could send it with staircase together, or you could buy in your local market.