Use of wood frame blocks can flatten those areas, imo, and probably won't mess the paint unless there is an existing issues. I made some blocks with my drill press. They worked out real good, need a real big mofo clamp or bench vise to use.

I rolled out dents in Columbus framed Bianchi. Worked out great! The guy that bought the frame was amazed with the results. the dings did a hit on the market value, but now value was there.