After about 3 months of planning I'm finally ready to powder coat. I have my Caswell hobby gun, sandblast cabinet, powder coating booth, and oven all ready to go. My first parts will be several small cast iron parts (cast iron engine thermostat housings). I have prepared the part by degreasing, sand blasting with black beauty, and sprayed/wiped down with brake cleaner. Being cast iron I feel I should preheat the part as a precaution. I figure this will prevent outgassing and burn off any residual oils. After doing some reading I have some conflicting information. Do I heat the part to 350 for say 20 minutes, let it cool to about 180, and then shoot?
If I was shooting regular steel should I preheat to aid in the powder being attracted to the part? If so what temp? How long?
thanks
-Joe
If I was shooting regular steel should I preheat to aid in the powder being attracted to the part? If so what temp? How long?
thanks
-Joe
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