I tried this with a lighter on a stress mark that appeared on my Cyclonus figure and ended up making it 10x worse; so I would advise extreme caution. Start on the lowest setting and only for a few seconds at a time. Work your way up in power slowly and turn it off the moment you see the barest hint of a reaction from the stress mark. I got overzealous when I noticed a change and ended up watching in horror as the stress mark disappeared only to be replaced by an ugly burn.