CAUTION... with a DE blade the second sharp edge is too
close to the other sharp edge so you are very likely to give
yourself a big old cut by hand stropping.
In the early days of DE blades there were small shallow dished hones
made and special stropping gadgets that exposed only one
edge at a time. A gadget guy could make a stropping and honing
guide if he was so inclined.
The best bet is to hunt the local drug store for some DE blades.
They are all "no name" but are mostly in the Persona family
and they are inexpensive enough to use twice perhaps three
times. There is no internet shipping so the four cents per blade
is just that four cents... give or take depending on the area.
Almost all of the DE blades have fused layer of Teflon that helps
them shave well even when the edge so, so. Hand sharpening removes
it and the fusing of the Teflon is hard on the steel temper so resharpening
while an interesting exercise is difficult to do on such thin metal.
Flipping a blade is not equivalent to stropping on canvas+leather.
Once the cutting edge is collapsed using the edge from a
reverse angle will not help.
Stropping on canvas followed by leather seems to pull out and straighten
the collapsed edge and also finely polish it. So not the same process
as flipping.