Dirty Jugs!

I got me some dirty JUGS! and not the good kind. Im trying to clean up all the parts before assembly. This is a bit ridiculous. Getting between the fins is brutal. I want to keep the weathered look on the motor so I am hesitant to take the dremal to it and scratch it all up. Its been varsol, rags and a screw driver to this point. There has to be an easier way. Gonna try a bit of "motor boat" soon

Simple Green and a nylon brush drill attachment

What do you mean by "motor boat"?

Soda wash, pressure wash, boil in lemon juice. Motor boating will only get your face dirty.