I haven't ordered any P4 Endurance yet. But the last Michelin tires I got were a pile of closeout Krylions from the old Bonktown when the P4 stuff came out. They too were covered with the waxy crap, and were the only Michelins I ever noticed it on. I didn't bother scraping it, just road them that way with no issues. And it actually helped my Kurt Road Machine from slipping which had been issue.