Posted: 6/13/2026 4:52:26 PM EDT
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I'm powder coating a show stick for my granddaughter. It's aluminum and was painted black. I scuffed it up with 400 grit paper. Cleaned it with an auto degreaser and coated it. It came out looking like this. Obviouly the powder coat reacted with something but the very end of the stick is purple and I cleaned it when I cleaned the rest. The end that is purple had a rubber grip on it but the grip is longer than the purple part. None of this makes any sense.. Has anyone ever run in to this? 
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To say that you are on thin ice would be a vastly optimistic view of your current situation. The ice has melted. You are being supported by the surface tension of water.
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Originally Posted By osprey21: You should of sand blasted it (or had someone do it for you) before coating it. What heat source are you using to cure it? I'm using this. It's a converted warming oven. That cabinet is long gone. It's replacment is bigger but not big enough  |
To say that you are on thin ice would be a vastly optimistic view of your current situation. The ice has melted. You are being supported by the surface tension of water.
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Originally Posted By Striker: It wouldn't fit in my cabinet. I'm using this. It's a converted warming oven. That cabinet is long gone. It's replacment is bigger but not big enough https://www.ar15.com/media/mediaFiles/135/38194.JPG @striker Do you have a build thread on the cabinet your using? I have a similar warming cabinet i'm going to be doing the same with, havn't ordered PID/relays or elements yet. |
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Originally Posted By Overcast: @striker Do you have a build thread on the cabinet your using? I have a similar warming cabinet i'm going to be doing the same with, havn't ordered PID/relays or elements yet. All we did was put an element from a kitchen stove in the bottom and put the switch up top. A friend of mine made the mods for us and I'm not an electrician so I could explain it to you more then I did.  The box on the bottom is covering the ends of the element. |
To say that you are on thin ice would be a vastly optimistic view of your current situation. The ice has melted. You are being supported by the surface tension of water.
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Going to give it a coat of silver and if that turns out ok I'll hit it with the purple. Why do things have to be so difficult.. 
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To say that you are on thin ice would be a vastly optimistic view of your current situation. The ice has melted. You are being supported by the surface tension of water.
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Between the rubber extending past the line and the very distinct line make me think it wasn't the rubber, or lube/adhesive for the rubber that caused it. I'm thinking they dipped it in acid to clean it during the manufacturing process, and since the handle was going on the end they only dip it part way. Aluminum is pretty porous, and oils can come to the surface during heating causing bubbles in the powder coat, or occasionally react with the pigment. I use an aluminum cleaner, pre bake at 450 for half an hour, let it cool then wipe it down with acetone. Sometimes you need to wire brush it to clean up some oxidization during the pre bake. You can use 50/50 white vinegar/water and isopropyl alcohol if you don't have aluminum cleaner or acetone. |
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Originally Posted By Herc: Between the rubber extending past the line and the very distinct line make me think it wasn't the rubber, or lube/adhesive for the rubber that caused it. I'm thinking they dipped it in acid to clean it during the manufacturing process, and since the handle was going on the end they only dip it part way. Aluminum is pretty porous, and oils can come to the surface during heating causing bubbles in the powder coat, or occasionally react with the pigment. I use an aluminum cleaner, pre bake at 450 for half an hour, let it cool then wipe it down with acetone. Sometimes you need to wire brush it to clean up some oxidization during the pre bake. You can use 50/50 white vinegar/water and isopropyl alcohol if you don't have aluminum cleaner or acetone. Tks for the info. I'll update when I hit it with the silver. |
To say that you are on thin ice would be a vastly optimistic view of your current situation. The ice has melted. You are being supported by the surface tension of water.