A good thing to do is make a hanging or paddle strop with some denim and then apply 0.5 micron diamond spray. Half a dozen swipes when the razor starts to pull will bring the edge back..!

The other thing you could apply is the CrOx spray (that would be my choice as I prefer CrOx to diamond) or make a balsa paddle strop and apply CrOx paste to that.

Any of these options can be made for a few pounds plus the cost of the paste.

You'll be well set up with a kit from SRD and you won't need to touch the edge up for a fair shaves, so don't fall into the trap of "I'll just try this paste out..." because it's easy to over cook the edge, especially if it doesn't need touching up..!

Good luck and keep us posted!