I am working on these drums today. Getting them stripped and cleaned up. Here is my theory on this edge of the 13". It looks like the plastic of the wrap is lifting like it got hot at some point. So I think someone must have set it down on something that got very hot in turn making the rim very hot and then causing this wrap to melt and lift. Im hesitant to do to much or pull the lifting plastic pieces off. I may just continue on the bass drum for now and get the hardware all cleaned up and then go back to this 13". It really isn't that noticeable when the rim is on so that is good.
What do you guys think?
Curtis