Thread: Possibility of sharpening a dull razor?

I have 5 razor blades.

2 or flat out dull, couldn't cut butter.
2 or sharp, work really well for shaving. If I strop them when they need to be, they stay sharp.
1 is kinda in the middle, won't shave great but it can if need be.

Am I able to make those three sharp? If not the 2 dull ones, the one kinda sharp one?

This is the kind of blade I have:


(Funny thing, that razor has rust on it and it says rustless finish.)

Please help!