do you have any good resources on how we would determine a range for our pre finish, or is it just trial and error?Burnishing is HIGHLY dependent on the pre-finish.
If the finish is not consistent you will be chasing your tail forever
I've burnished thousands of tubes made from aluminum, stainless & titanium.
Each one had different running parameters, but all needed to have a specific pre finish roughness so the burnishing process would work.
If the pre-finish is too smooth, its just as bad as being too rough.