I'd say unless the record is unplayable live with minor warps.
I've tried traditional and modern methods of trying to flatten reocrds with varying degrees of success.
Last machine used was the AFI Flat.
Most of the time it works pretty well, but it has ruined several records including a numbered Blade Runner soundtrack on red vinyl and a sonically mint early pressing of Fleetwood Mac Rumours.
The Blade Runner was a strange one as I had successfully flattened many colored records but QRP must have used some non-standard vinyl formulation that made it susceptible to heat damage. After treatment a rough orange peel pattern appeared on the record and it was unplayable. Other owners of this record have also experienced ruin using a variety of de-warping methods.
Caveat emptor when using these devices.