Yep, that's what Michellin's do. Their rubber compound just can't take the UV but still the best tire out there. I've seen several rigs with tires like that and it happened to the Mich's on our pickup after about 7 years in the sun. Leave them a note and tell them to get a FMCA membership and go buy a new set with the Michellin/FMCA discount.
