Replace panels before or after dipping?

Dipping before you cut out metal.
Liquid will get everywhere. They dip them power wash, then dip and power wash and typically a third dip and power wash and then a neutralize bath then a primer of some sort. It’s not like sand blasting where you are paying for the time by the hour. And the more metal exposed the better.
Put up some photos if you can get them.
Very exciting.
Syleng1