Any EvpoRust contact with the frame will help. Soaking rags, wrapping then around then wrapping plastic bags around that would be my suggestion. Repeating every few hours might further help. My experience with ER is that it is rather temp dependent. So keeping the wrapped frame as warm as possible will help shorten the time. For inside the tubes I'd consider pouring in the ER then sealing the open ends with rags and changing the orientation of the frame every so often.

I picked up a plant tray that's rectangular in shape and about 4" deep. I place a bag in that to act as a bladder/liner. Then place one section of the frame in it at a time (head tube, then Down Tube, then stays and on). Doesn't take up much more space then the frame alone and I can reuse the ER for the rest of the frame.

Don't forget to rinse well and dry out that water. Andy.