I can do a quick (relatively) shave with my straight with no prep, and nothing but water, with no ill effects so long as I use my aftershave setup (Thayer's, anti-ingrown serum, alcohol splash, Weleda Balm).
Takes me maybe 10 minutes tops, but that's probably a generous estimate. The longest part of that is stropping.
"You should always strive to make everything as simple as possible, if not simpler." —Yoram Bauman
Simon Pure Cutlery "Magnetized" Straight Razor, Tweezerman Brush, Tom's of Maine Peppermint.