I guess if the metal is doing 99% of the support work, then you might be able to "spray on" grip. This might be SUPER IMPORTANT if it's biodegradable, with all

I guess if the metal is doing 99% of the support work, then you might be able to "spray on" grip. This might be SUPER IMPORTANT if it's biodegradable, with all the stories about the noxious effects of car tire wear particles impacting the environment. Since the "grip" doesn't need to do the support job, we can use a more fragile compound.