Hi,
To ease my current elbow strain my physio has suggested increasing the diameter of my bar.

I'm thinking of wrapping some type of grip tape around it to build up a bit more diameter. Been looking around online and I'm thinking along the lines of bicycle bar tape. But I don't know whether it will stick to the current foam covering and also how long it'll last in the water...

Has anyone else tried to do this and if so what tape did you use and how'd it go?
Is there such a thing as waterproof self adhesive foam grip tape?

Cheers.