Used compressed air a few times through each hole, then power clean and flush through it all, then more air 30 minutes later.Acceptable.
What did you use to flush?
What year Jeep by the way?
This is a 1990, I'm having it repainted probably some time by the end of the year. It has quite a bit of rust along the base so I need to replace all the panels then send it to the paint shop.