What grit sandpaper to use on aluminum?

Release Date:2023-04-17 15:48
Aluminum is a popular material used in many industries due to its lightweight, durability, and resistance to corrosion. However, like any other metal, it can become scratched, dented, or corroded over time. Sanding is one way to restore aluminum to its original finish or prepare it for painting. But what grit sandpaper should you use on aluminum?

Grit refers to the coarseness of the sandpaper. The lower the grit number, the coarser the sandpaper, and the more material it will remove. Higher grit sandpaper has smaller particles and will create a smoother surface but remove less material.

When it comes to sanding aluminum, the grit you use will depend on the task you're performing. Here's a guide on what grit sandpaper to use on aluminum for different situations:

1. Removing Paint or Corrosion: For heavy-duty tasks such as removing paint or corrosion, start with a lower grit sandpaper like 80 or 120 grit. These grits will remove the material quickly and leave the surface rough, so you can switch to higher-grit sandpaper for a smoother finish.

2. Preparing for Painting: If you're preparing aluminum for painting, use a higher grit sandpaper like 220 or 320 grit. These grits will smooth out any imperfections and provide a clean surface for the paint to adhere to.

3. Polishing: For polishing aluminum, you'll need to use very fine grit sandpaper like 400 grit or higher. This will create a smooth and shiny surface without removing too much material.

When sanding aluminum, it's important to use a sanding block or pad to maintain a flat and even surface. It's also essential to wear proper personal protective equipment, such as a dust mask, safety glasses, and gloves, to prevent injury and inhalation of harmful dust.

In summary, the grit sandpaper you should use on aluminum depends on the task you're performing. Lower grits like 80 or 120 are suitable for heavy-duty tasks like removing paint or corrosion, while higher grits like 220 or 320 are better for preparing for painting. For polishing, use very fine grits like 400 or higher. Remember to use a sanding block or pad and wear proper personal protective equipment when sanding aluminum.
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