On the other side of our little town we have a capable professional powder coating company with an oven that can powder coat large items like boat trailers.
I called him to ask what he does with the powder that falls on his floor during a job. He said he sweeps it up and throws it away because if any is left on the floor -- which he keeps very clean -- it might jump up onto the charged metal he's coating and ruin the job.
He uses a lot of different powder types -- matte, glossy and textured -- in various colors. I told him about coatings for bullets. While he had not heard of that use, he sensed a glossy powder would be best vs a textured powder.
He's closed now (today is 12/31/18) until after New Year's, so I have not seen what is available yet, but he said he'd sweep up his next job and put it in a box for me.
I've used only Harbor Freight Red powder so far. Eastman powders are highly rated too.
If this "recycled" powder works out, what kind of powders should I look for?
Would it matter if the same manufacturer's powder was mixed into a weird color?
Any warnings you can foresee other than possible dirt contamination?
If this works out, I might have an unlimited supply of powder that was going to be thrown out. And I only need a few tablespoons of a given color for a batch of boolits. Seems like it would work. Worst case scenario, I melt down the batch and start over.
Ideas?