Shellgrip I believe was a product. Presumably Shel. It did wear as you say but pre-wearing it was incredible. Other versions are available with similar grip. Rare to see long stretches of it here. IOM has loads of it.
I totally agree about the shit tar and stones. We still have that here. Another means to wreck you!
Think there was a drainage issue to, comparable to the permiable tarmac (?) that if not maintained can cause issues of reduced grip and increased damage/higher maintenance costs.
Shellgrip I believe was a product. Presumably Shel. It did wear as you say but pre-wearing it was incredible. Other versions are available with similar grip. Rare to see long stretches of it here. IOM has loads of it.
I totally agree about the shit tar and stones. We still have that here. Another means to wreck you!