You are correct they do work and pretty well.
Originally Posted by Johnny_Crunch
You can use a weed burner from the outside and it will remove the inside liner. I did it in a neighborhood with no issues.
I did that, and its sooo not worth the propane
I would almost rather suit up and dawn the respirator, doubled up hearing protection and dive in with a grinder and wire wheel. I just have an aversion to doing it is all.