All parts are similar in size, and are shot blasted before coating.
My question is that every few days, every part that is dipped is bad, meaning some areas of the part the paint does not seem to correctly adhere to. It looks like a flaky scale, and will rub off simply by touching it in those areas. Our process does not change at all, and one the parts are blasted again and repainted everything seems to be ok. I am out of ideas on this. It seems to be more than just a dirty part problem.