I have seen examples of ultrasonic cleaning of actions and small parts, sometimes with spectacular results. Does anyone have experience with ultrasonic cleaning of barrels- specifically damascus barrels in a larger ultrasonic cleaner? L & R makes this one that will accept parts up to 36"

https://lrultrasonics.com/systems/le-series/le-36-sweep

Unfortunately it is well out of my budget at $10K+. Do you know of anyone that would offer this service?