A couple of years ago in
THIS THREAD about rust on a Dovo, Utopian talks about a process he's been using since 2002 to successfully prevent his razors from rusting. He first mentions it in post #2, explains the process in post #5 and comments on it further in post #22.
There's discussion about using different kinds of alcohol but Utopian says it doesn't matter. He'd mentioned his process in other threads and IIRC, he said he used 70% isopropyl alcohol.
I've been using his method described in post #5 ever since reading that thread. I let my razor dry open for the time it takes to rinse my brush, clean & dry my scuttle and apply witch hazel and after shave balm then put it away. Quick and easy to do and zero problems with rust ever since.
Utopian isn't with us anymore. Bummer his rust preventive process isn't a sticky in the Beginners section or the wiki because it's simple and it works.