Different media than sand can be used for delicate surfaces. I was only aware of plastic as an alternative but apparently there are lots of options out there.
Soda blasting would be a good option for thin wall tubes.
There you go, lots of media materials.
@Brommers started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Different media than sand can be used for delicate surfaces. I was only aware of plastic as an alternative but apparently there are lots of options out there.