pre bake and metal discoloration
When I prebake parts, such as an air cleaner, to outgas it and burn the oil out of the seams they always darken to a blue color. I realize that the metal is OK when this happens but it is necessary to resandblast the part to remove the discolorization or can the part just be coated as is? I have been resandblasting but it seems like I am doing the same thing twice here.
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