Can I Spray Paint Over Rust?

Are you tired of rust ruining your favourite metal item? This guide explores whether you can paint right over it. 

Many beautiful vehicles and boats, prized possessions and garage toys have been ruined by rust. Rust can wreak havoc on any metal object. It will make items look unsightly due to a coating of yellow-brown flaky coating. Rust is caused by a chemical reaction known as oxidation. During this process, iron will return to its original unrefined state. Since oxygen and iron have opposite charges, they are drawn together. However, this causes iron to lose electrons and thus develops the coating of rust. 


But what if rust has already developed on your favourite boat, vehicle or other items? Can you simply paint over it to cover up this unsightly issue? Not really!

Can You Spray Paint Over Rust?

It is possible to spray paint over rust. However, there’s a catch here. You need to make sure that you are preparing the metal the right way. This will impact how long the new finish will last and whether it will provide a long-lasting solution. Here are the key steps you must take. 

Remove Any Loose Rust Or Paint 

First, you must remove any loose rust or paint that is on your item. You can do this using either a wire brush or sandpaper. Your aim here is to ensure that the surface is almost completely smooth but still with a hard layer of rust. 

Clean The Surface Of The Item 

Next, you should ensure that the surface of your item or vehicle is as clean as possible. Both grease and oil can prevent paint from adhering to a surface. The good news is that you don’t need special tools to clean your metal. Instead, you can just use detergent water wash. For particularly stubborn issues, you might want to consider using a degreaser instead. However, you should avoid using strong solvents as these can cause the older paint on an item to soften. 

Priming The Metal 

Next, you need to choose the right primer for your metal item. Essentially, you need a rust converter. The right rust converter will provide numerous benefits. It will neutralise the corrosion process. A rust converting primer like this will provide a hard hydrophobic film primer finish across the rust that you can paint over. You just need to make sure that it is compatible with the paint product you are using. 

To ensure that you get the best results, you might want to consider applying 2 or 3 coats of rust converter. This will ensure that the rust is completely covered 

As you can see, it is possible to spray paint over a rusty item. You just need to take the key steps to ensure that you do achieve a long-lasting, durable finish.