I recently purchased an Eastwood Buffer kit which came with a set of buffing compounds. The compounds are in nice “reusable” tubes. Unfortunately the compound is stuck in most of the tubes. Any ideas how to get the compound out short of just cutting up the tube? I’ve tried shaking, pounding on a table, pounding the sides on a table, heating in a water bath, etc all to no avail. Thanks for any help you can give.