I've had a load of work done on my chargecooler and there's loads of metal filings inside it now.
I cut the end tanks off and grinder off the faces so they were clean/flat to have new ends welded on and also drilled a bleed hole in the water circuit.
Now I need to clean it out to refit it.
I tried washing it with parts wash, nothing. I've got a cleaner that goes on an airline and let's you fill it with brake fluid cleaner then fire air through it at 3bar, that helped but wasn't enough.

What can I do to clean it all out?
I've spoken to a local firm that make intercoolers/radiators....
They will steam clean it for me but don't guarantee to get it all out. And it's £60.
What else can I do?

Any others ways of cleaning it???