Rub rail insert damaged-fix?
 

I crunched up the right rear white rub rail plastic insert during a silly docking maneuver the other day. My fault, no excuses, for no reason at all.

How does one fix such damage, please see attachment. The steel rub rail and the fiberglass is fine, just the white plastic insert needs to be replaced.

Does the whole strip (about 20ft) need to be replaced or can one just cut out the damaged part and insert a small piece of the white plastic insert?

Any advise?

Thanks,

Jamal