molassess and crank shafts

[4tford]

Last week I got rid of 2700# of scrap. I did keep some merc cranks that I would like to save. Pretty rusty although the bearings surfaces are not to bad. Question is if I soak these cranks in molasses and water for 3 or 4 days to remove the rust, will this harm the bearing surfaces. All the cranks need to be reground. Thanks Bill