we frequently eat at a family that follows minhagei chassam soifer, and they don’t have salt on the table for the challah. when we come they always take out the salt for us.
even though, we could very nicely eat the cahllah without dipping in salt, but it’s just a derech hamoin am, so they put it out.
i would say you should do the same with mayim achronim. don’t make an issue out of it…