Downtube? If the plan is to strip and repaint and the tubing compressors are available then I would roll it out.
This rarely fully repairs the dent however so some fill will be needed. Be aware that if powder coat is intended
that powder coaters stripping of the frame will probably blast out any fill you use that is epoxy based. I had an
aluminum tandem frame powder coated and it had a small dent in the top tube which I filled carefully with
high temp labmetal but the powder coater blasted most of it out.