Interesting, the only reason I did it in alcohol is to be sure the water is displaced when I store it.
And for that reason you are all fine of course. (You get the result in the quickest (drying)time possible). The 70% is for newly gained vintage razors only. As a matter of fact- me myself don´t bother for the alcohol soak but for the first time only. (Again- only vintage razors- and again probably not needed..)