Painting Over Zinc Chromate
Q. I run a custom painting operation. We have been asked to paint some aluminum aircraft structural parts. What is the best method of painting over 6061 Al that is covered with zinc chromate? Should I use a wash primer or some other type of primer? Also, some of the parts have areas that the customer wants to look like polished metal. Is there an easy way of removing the zinc chromate coating from certain areas of the aluminum in order to have a polished metal finish? R.F.
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