So; soaking in a solvent ,shaking out and then soaking in something like 30wt. will do the trick without damaging the freehubs innards?
I've got a 8-9 NOS tiagra/mavic cxp wheelset and the freehub is dragging -probvably from the fact that the lube in the body is...old.
I was simply going to pick up a new 8-9-10 freehub from the LBS but if this will work it can save me some bucks.