Hi there, are you sure that's not flaky bits of shed ? That's what it looks like. How's his health otherwise, activity level, appetite, etc ? It's nice to see an " Old Spike ", hopefully he'll be around for a while yet.
Agree with the prior comment. The pic quality isn’t the best, but sure does look a lot like he is getting ready to shed. How is he otherwise? Eating? Energy level? Acting normally or sick?