All the better, then.

[He saw that glance, and he nodded. Time to put that thing on, enjoy some shirtlessness while he worked.]

Anyone from my time would be able to read them, but fortunately most of the Round Table is comprised of Sabers. The Lancer could be troublesome- my King has been summoned as a Lancer before, as has Lancelot- but other than that we should be fine. And even if they could read it, that would trace the arm back to Merlin, not me specifically.