I recently picked up some old Lortone pre-polish and polish at a garage sale. Both are white powder and came in tin cans. I just got done running a batch through the pre-polish and polish, each for a week in the rotary tumbler (with plastic pellets). I'm not impressed with the results I got. I'm used to using TXP or various aluminum oxide which produces a much better finish. So, my question is, does this stuff go bad over time? Or, is it a compound that requires a different approach? There's very little information on the aged labels on the cans, just Lortone Pre-Polish and Lortone Polish. Does anyone have any idea what Lortone might have been passing off as polish 30-50 years ago? I also noted that the polish, when mixed with water, was very white... like white paint. Usually rinsing the drum is enough, but I had to sponge this stuff out. Any ideas what I'm dealing with?