First off congrats on the RMD! It's a sweet knife.

I wouldn't use the RMD as a striker. I personally don't use the edge for obvious reasons. I'm not 100% sure if the RMDs are differentially treated, but I'm pretty sure it is, which means the spine is softer. It's a high carbon knife so it'll definitely work, but possibly a few strikes with the spine and you'd smooth it out.

I always carry a dedicated striker, and many people make strikers out of hacksaw blades and they're suppose to work wonder.