There are several instances when powder coating where multiple coats will be involved. Often times, it is a clear coat for added protection and appearance. Sometimes it is required, chrome powders need a clear to protect them from oxidizing. Candy colors need a chrome base to achieve the candy look. Also, multiple colors can be applied onto one part to achieve a two-tone look. This article will help you apply multiple coats of powder the correct way.
Spraying powder coat is a fairly simple point-and-shoot job once you get the hang of it. After you have done all of the necessary cleaning, blasting, and masking; shooting the powder is the next step. This article will help you achieve the correct coating thickness and avoid orange peel and other defects.
Powder coating requires some very specific prep work if you want your finished product to be free of flaws and last a long time. The preparation steps below will eliminate 99% of any issues you may be having in your powder coating work. If you plan to start powder coating in the future, this step-by-step will give you an idea of what kind of prep work is required for successful coating.
Welcome to "How to Build a Powder Coating Oven - Part II." See How to Build a Powder Coating Oven Part 1. In part 1, we build the oven frame, we started skinning it in sheet metal, we added lights and the convection blower, and also insulation and heating elements. I am going to pick up right were we left off. This powder coating oven build was done by KNJ Custom Coating and I want to thank them for contributing all of the information and pictures.
When you are powder coating, you will need an oven to cure the finish. You only have so many pre-made oven options at your disposal and they all limit you to smaller parts. A household oven or even a toaster oven are great for smaller parts but you will always be limited by the oven size. If you are interested in a smaller oven, check out the original oven article: Powder Coating Ovens. If you want to start powder coating some large parts, you will either need to spend a lot of money or make your own. In this article, I will be focusing on how to build your own powder coating oven. It may seem intimidating if you have never worked with metal but with the information available on the internet, you can easily tackle this job, save money and have a huge powder coating oven. No welding was required to build the following powder coating oven. This is Part 1 of a 2 part powder coating oven build. See How to Build a Powder Coating Oven Part II.
You have your air compressor and powder coating gun and you are ready to start powder coating? Not so fast, make sure you read this article first. When powder coating or sandblasting, you need clean, dry air. More than just compressed air comes out of the outlet of your air compressor. Water, dirt, and oil will also be included in this compressed air. It is very important that you treat your compressed air and remove these contaminants when using your air compressor for powder coating. The same information I am about to provide also applies to auto painting, compressed air machinery, or even just using common air tools, any tool that connects to your air compressor will appreciate a clean air supply. Read this article: How to Buy an Air Compressor if you haven't purchased an air compressor yet.
In this article, I will explain how to choose an air compressor that would be suitable for powder coating. Regardless of powder coating, an air compressor is one of the best tools to have in the shop. By itself, all an air compressor does it make noise and take up space, but the tools that it can power are great. Air tools are often cheaper than their electric counterpart, and most of them are better. If you are thinking that you don't want to get into powder coating because you have to go out and buy a big expensive air compressor, just think about how much an air compressor can help you out in the garage. I don't even include my air compressor in my powder coating budget because of how many other things I use it for. It is another one of those things, that when you own one, you will never want to be without one again.
There are several companies that manufacture powder coating powders. Dupont, PPG, NIC, Tiger Drylac, Sherwin Williams, & 3M are some popular manufactures. However, large companies like these prefer to sell large quantities of powder. It is not practical for them to mess around with selling 1lb here and 1lb there. Some of their "sample sizes" are 50lb boxes. As a small, custom powder coater, you will probably not want 50lbs of any one color so ordering directly from these companies isn't practical. Luckily there are companies out there that buy these powders in the large quantities and re-sell them in much smaller quantities. This allows you to buy powders in 1lb quantities, and in some cases, even 1/2lb quantities. The average pricefor a pound of powder is about $12 and 1 pound can go a long way.
Learn how to get perfect masking lines, also several different masking materials explained.
In the last masking article, I covered the very basic masking supplies needed for powder coating and also the reasons you would need to mask. In this article, I will show you some not so common ways to mask off parts when powder coating and also show you how to get nice, clean looking masking lines.
Masking is a tedious but required part of powder coating. There are some parts that you will come across that will need some areas masked off. I will explain several different methods and materials to help you do do that. This will be Masking Part I. Don't forget to check out Masking Part II and the Wall-Mounted High Temp Tape Dispenser.
When powder coating, it is important to mask off certain areas of certain things. Powder coating is a thicker coating than most paints and if you don't mask certain areas, things might not go back together when your done. You can also use masking techniques to make designs, logos, and words on the things you are powder coating for a different look. Masking techniques and supplies are not all standardized, sometimes you have to get creative to mask off certain items. Again, this will be one of several articles on masking so I will cover the basics of masking here.
|This alternator case is masked with Polyester Powder Coating Tape. This tape can withstand 400 degrees without degrading.|