Hi Everyone. Looking for some help with my Ludwig LB552 14 x 6.5 bronze Supraphonic that I purchased used in 2013. There is tarnishing all around the top edge of the drum, and what looks to be many areas of the finish actually peeling off, as can be seen on the left area of this photo. I don't know the year of manufacture, but it does have the P33 buttplate, without the lug gaskets. It was not like this when I got it, and, during my tenure as owner, it has spent most of its time in my closet. Looking for information about what this is all about and why this is happening to me.