I needed to remove some headset cups and didn't have my cup remover on hand so I used the no-no method and tapped them out with a screwdriver.
Both cups came out fine, and I thought I was being really careful, but I still ended up with a couple scratches in the top portion of the head tube.
I know the head tube sees a lot of stress, so would these be problematic? I sanded with some 320-800 grit to try and flatten them out a bit but you can still feel them.
My personal feeling is that it's not a problem but what do I know.
Thanks.