I prefer at least 5/8 for any purpose. My only 4/8 is not my favorite razor. Whether Coup D'Maitre, stropping, ATG, WTG, honing, whatever. IME, it's more difficult to determine the angle of attack or whether the blade is flat during those processes. The extra 1/8 going to a 5/8 makes all the difference in the world, IMO. Another reason might be that my 4/8 is a spike point and when I first started I was bitten twice by the nasty bugger. I still haven't fully forgiven it.