Sounds like you are headed down the right path. I am still trying different things on cast automotive parts to see what works best and consistantly. The cast parts I've done so far were polished to mirror shine, degreased, etched, DeOx/DeSmut. And after anodized and dyed some had discolored areas under the anodize. The dye color was even and deep over the entire part. It appeared like the material was trashy and not mixed to an even consistancy. I'll let you know if I find something that works on a regular basis. SS
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