I’ve done one or two...
Using an etch primer is good, but realize there is something in the paint that makes it “etch”. Usually, it’s acid. Once you do the etch, use a thin layer of a sealer primer. That will form a safe barrier to your top coat. Some pigments will react when applied directly over etch primer. This will lead to crazing over time.
if you need any more detailed info, PM me.