I would opt for the original bead blast finish. The frosty skin, round butt, flash chromed h/t, and narrow front sight are some of the more apparent hallmarks of the CS-1.
Were it a common 686, I would say shoot it as is (though I nearly hate polish jobs) but the scarcity of the CS-1 and the fact that it's a 4" on top of that, would compell me to return it to its original beauty.
BTW, though many say there are more of the "quad tubes" running around, I think you will see MANY more of the 3 inch guns on the blocks and in the photos posted here.
As I understand it, the longer barrels were issued to the "road guys" while the suits and brass carried the 3 inch models.
Which do you think were reclaimed and destroyed in greater numbers??
Ahem, and uh, I happen to have a 4 inch here in the safe - of course it's MUCH more rare than the 3.

