Have tried the carbon spray on a cpl of my sections , in my opinion its absolutely useless !!!
You need to apply about 6 coats before it starts to make any difference as its that thin. Then when you have built up a decent coat of it it tends to peel off anyway . Plus this doesnt strengthen the joint in any way whatsoever so u might as well just use candle wax .
As already said far better to get a proper job done by someone like Esselle if its a pole worth the expense of repairing.