In the last post I covered the equipment and set-up for powder coating so I’ll jump right into the powder coating itself!
The gun is connected to electricity and to an air compressor. First one has to push the electrical button, and while holding it down, pull the trigger on the powder coating gun. The air compressor feeds the powder out of the gun in a soft cloud or “dry mist”. Through the magic of electricity, the charged powder is electrostatically drawn to the charged metal parts. As a result, the powder sticks to the part and the excess falls harmlessly to the ground.
The photo below shows my husband demonstrating proper powder coating technique by coating the lamp cover. The close-up shows the texture of the powder “stuck” to the lamp shade.
He then passed the gun to me to practice on a old scrap airplane hinge.
It was surprisingly easy! I had enough confidence after doing the practice part that I did the remaining parts on my own. We then carefully hung the pieces in the pre-heated oven to cure. You have to be careful not to bump the parts or else you could shake the powder off the parts.
After only 20 minutes of curing or ‘baking’ the parts were done! We pulled them from the oven and hung them out to cool down enough to handle.
Here are some close-ups of the shiny, freshly coated and cured parts!
This photo shows the effectiveness of the plug and tape. On the bevel gear cover, the top hole had the plug, and hence the threads are not coated. The bottom hole was not plugged and is coated. The bracket has some ‘overspray’ on the backside, but no coating on the part where the tape was well secured.
Here are the rest of the parts – so pretty!
Another benefit of powder coating is that it is easy to add more powder to any parts that may not have been coated completely. For example, the far interior of the lamp housing and the back of the tension indicator were not completely coated. No problem! All that had to be done was hang the parts up again, re-spray with powder, and cure. Here are are the before and after photos:
This was so much fun that I’m looking forward to striping and coating Ms. Rusty