I picked up an air to air intercooler for my 2.2/4 turbocharged and injected Type I VW motor that's in my Speedster replica......it's been cleaned and pressure checked by the local radiator shop.

It has some scaling on it....either from the cleaning process or oxidation. I have cleaned the exterior with a wire brush but looking for an idea to flush the interior. I don't want crap to clog my injectors.

How is air, or even debris in air, going to clog your injectors?

Go to your local Heating and cooling secialists, and they have stuff to clean fins with, should be a spray, scrub, wash off reverse the flow of the air into it.

Duh...yer right...I was thinking fuel....not air. Too many projects in the air at one time.

would the intake air be an issue if some of the scales got sucked into the throttle bodies?

Google Fred's TDI Page in it will be an article on intercooler cleaning. Simple easy to follow proven effective. I would give you the link but my ISP has dropped DNS right now, so luckly I get to keep on the 914club