sometimes.. they have these glue stick things they stick on, and then pull the dent out to remove.. then they heat to detach..
i went to see a bodyshop about getting a scrape on my bumper done, and about some other lil dents.. this was no small outfir.. and they said they call the mobile dentwizard guy out as he's got the specialist stuff for those kinds of dents.. whereas they normally respray / replace panels.