The process of anodising is used to increase the thickness of the oxide layer on the surface of metal parts. Anodising can often protect the metals, and you will find it on items such as cookware, knives, and even cars. But many people prefer the more natural, bare look of metal on their product. For those people who would rather remove the anodising, it is possible to do so with some elbow grease and the right substances.
Put the anodised item onto newspaper. Oven cleaner is the most effective substance for removing anodising, but it is highly corrosive, so you must have newspaper down to absorb any spills. Otherwise, you risk ruining whatever surface area you work on.
Spray the anodised item with a coat of oven cleaner. It should be a relatively thin coat, but one that covers the entire anodised area. Leave the item and allow the oven cleaner to soak in for around 5 minutes.
When you return, you will see the oven cleaner has already started corroding the anodised area. This is exactly what you want; repeat that step a number of times until all the anodised area has been removed. This could take several repeats, especially if the surface is anodised to a high standard.
To prevent any further corrosion of the metal, wash the item with warm water and a cloth when the oven cleaning substance has got rid of the anodised coating.
After the removal of the glossy layer of anodising, you will notice the metal is somewhat dull. To remedy this, scrub the area with coarse, and then finer, wire wool. This should bring through the natural shine of the metal.
Buff the metal with metal polish and a rag. This should give the item a shine.