That would probably loosen everything up for you and allow you to move out the bigger chunks. I have never tried that and it may be all that you need.
I would also consider using a penetrating oil or similar after the bath to ensure that everything gets a good chance to loosen up (I use "Releasall" from Canadian Tire and save my high cost penetrating oil for really frozen stuff).
Unless there are chunks of debris present, I usually just apply a liberal amount of Releasall and let it sit for an hour or so, then dunk it in kerosine/varsol/etc to remove loose material, then spray again and let sit for another hour (or longer, depending) before testing to see if it has loosened up.
...... Just wait until Gunnut69 shows up - he'll have a bang-on solution for you!