After getting a reasonable finish, a flash of heat with a flame works wonders.
It is a bit tough trying to do this - can't do much testing.' efficiency grade goes down!'
Some of this needs a bit of practice - it only seems to come with experience.
Different cutters and different material (specs) give vastly different results.
Cut depths are a function of the cutter diameter and strength.
Look at specs supplied by tooling suppliers. Email, ask..
Rusty? Nice. :wee::wave::cheers:
Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way.