We have been stripping and cleaning the Donor Tank Brad Replogle loaned me to make a mold Plug from.
I said it would be cleaned outside and Inside . This is why you clean the inside of every tank !
This is what came out of that tank on the first flush with Evaporust !
It took me a week and three times with Evaporust then five flushes with regular cleaners to get it so no residue or particles showed up in the paint strainers when I drained it .