How I am able to guarantee stones
Not all sharpening stones will sharpen steel fine enough to shave from the resulting edge. Many are fine for tools or knives, and I test for those uses as well. In my testing I first create a fresh bevel on the chosen razor with a 1,000 grit King red brick stone. With the new bevel at the razors edge formed I next use a well-worn Atoma #400 diamond plate to raise a slurry upon the test stone, and it is this slurry and only this slurry that I use for honing the test steel.
If the razor's steel bevel, with a 1k King scratch pattern can be honed by that test stone to a shave ready after a simple stropping in:10 strokes = extraordinary: 20 strokes = noteworthy: 40 strokes = worthy, Any more than that I make a note and try a different steel.
Stainless, high carbon, wrought iron, all can be tested and noted. Matching stone to steel saves time in the long run. This is why chisels come in sets, and bullet calibers exist. Efficiency cannot be faked when sharpening razors. Adding muscle or weigh flexes the blade leading to irregular wear patterns on the steel. Drinking whiskey to pass the time while honing razors for more than 10 minutes suggestes, well, a waste of time.