Ok so I'm just full of questions tonght. I have a new Cabelas vibratory case tumbler and I've used it twice so far for about an hour each time. the first time i noticed no wear when I emptied the media and cases into the sifter. then i added some of the case polish that came with it and after sizing my brass ran them again. now the plastic in the inside of the dish looks like it is coming apart all stringy and peeling off the sides. did they give me case polish that eats the plastic? at this rate I don't think the tumbler will clean 1000 rounds before the thing falls apart.