Tom Bowers he does lots of rebuilds/repairs ectSo a lot of suppressor companies went under in the last couple of years. Anyone cleaning and or completing maintenance on a suppressor that is not under their name. I have one I need cleaned.
Soaking in Kroil may help but I know that putting it in a US cleaner will do it and it's about the only way I know of to clean a sealed can well (though I've never needed to clean a sealed one). I put a pan of Kroil in the water and put the parts in that if I'm worried about the finish. It's not as an aggressive cleaning but it doesn't damage aluminum or weaker finishes. Although Hornady does sell a cleaning solution for use on firearms and it's mixed in water. A whole upper will fit in the Hornady US cleaner I have.Yeah I have a couple Tbac's and I am going to order one more. Mine is on a 22 and the baffles are stuck.