My mast has a nice dent where the previous owner dropped the mast onto the mast ball, it's a H17.
The dent is nice and smooth and no sign of distress or cracks...and after a few sails it has no signs of anything adverse....except I could see it.
As I added a H17 Super Jib, the blocks now hit the mast in the area of the dent...so I cured two problems with one solution, I glued a sheet of 1.5mm rubber sheet over the area....now I can't see the dent and the Jib Blocks have something soft to hit against.
Nige