Can You Powder Coat Over Existing Powder Coat?

Whether you’re looking to refresh an item’s appearance, or you want to change the color entirely, there’s probably one question you’ve been asking yourself. Can you powder coat over existing powder coat? Many hope that the answer is a simple yes or no, but the truth is a bit more nuanced.

It turns out that several factors determine whether or not it’s a good idea to powder coat over existing powder coat, and even then it’s really up to the judgment of the one seeking powder coating. Learn all about the factors and limitations involved with powder coating over existing powder coat.

The Short Answer

Put simply, the answer – most of the time – is yes. There’s nothing about powder coating that makes the material fundamentally incompatible with more powder coating. You can still have the powder applied and cured to form a new coating that looks just like new, in most cases. It’s important to remember, however, that applying new powder coat isn’t the best solution to all problems.

Compromised Coating

In some cases, powder coating can leave an object with imperfections if it isn’t applied properly. These imperfections can include problems like bubbling, spots, fish-eyeing and more. If you encounter problems that can be solved by outgassing, simple sanding and buffing, these may be better solutions than applying an entirely new powder coat.

When Does Powder Coating Work Best?

Powder coating is a relatively simple process, but it only works if certain factors are in place. The primary factor is that the powder coating should be applied to a new or clean surface. Since there are many different kinds of chemistry used in a variety of powder coatings, not all kinds will respond well with one another. That means you need to consider compatibility before applying a new layer of powder coat on an old one.

The best thing to do is to scrape the old coating off before new powder coating is applied. This can be done by sandblasting the object or by using chemicals to strip the powder coating away. This can be a long process that’s much more costly than buffing out a compromised section of coating, which is why we recommend putting powder coating over powder coating as a last resort.

How to Powder Coat Over Powder Coat?

If you do decide to powder coat over a previously powder-coated object, prepare for a time-consuming and costly solution compared to other solutions to coating issues. For problems like severe adhesion issues, you don’t really have a choice but to add a new powder coat if you want the kind of protection you deserve.

To start, you’ll have to rip the old coat off down to the metal. Don’t compromise on the stripping, either, because a powder coat finish is only as strong as its weakest layer. Once it’s finished, you’ll have to make sure there are no errors in the application and curing process. Powder coating done correctly should be flawless, so any problem at the end is likely due to an error in the process or the equipment.

Powder Coating From AR Powder Coating

If you don’t want to worry about process errors or faulty equipment, AR Powder Coating has got you covered. We can strip and recoat any object you need with our state-of-the-art equipment and best practices. Contact us today to learn more about what we can offer.