cleaning a ball screw

Hi all,

I picked up a rusted ball screw today. complete with nut. The shop
had a roof leak and the batch had been rained on, in the box and the
screws show lots of rust.

some light orange, some dark maroon and obscuring hte threads.

I picked out the one that the ball moved freely on with the hopes of
using it. any ideas on the best way to remove light, medium and
heavy rust ?

I hope that I can just cut off the 8 inches of heavey rust and
somehow polish the other 2 feet and use it for something. I do
understand that any rust means loss of accuracy. I'm just hoping to
have a little better thrust and accuracy than all thread.

Dave