I dunno man.. some shops have a “more is better” attitude to a lot of things.
I’ve sheared bolts right off that turned out to have red thread locker on them. I’m afraid I wouldn’t know the line between busting loose the thread locker and starting to twist the stud off. Heat will definitely resolve the issue though.
If you are comfortable with your estimation of a certain torque value not to go above (because most torque wrenches aren’t reliable turning left) go for it. But personally I’d grab a cheap torch from the store just to avoid the risk.
The short lugs getting thrown away maybe. Not your RW lugs. A wire hand brush and the right solvent would make that redundant though, I’d think.