So I've been faithfully diamond-stoning my side edges whenever I get back home from ski trips. I either haven't messed anything up so far or my ski technique isn't refined enough to tell that I've messed up anything...
First question I have for the greater audience here. The guide plate (i.e. the thingie that pushes against the base) of my side edge guide looks like this:
What is the black gunk? It doesn't just wipe right off. I'm assuming it's just gunk from what passes as "snow" in New England that transferred to the base and now to my guide... Anything to worry about? Should I be brushing my bases to clean them a bit prior to starting edge work?
If it matters, my guide is one of these: