Wife caught a piece of rusty angle iron reversing in a car park and left a nasty V shaped nick in the outer profile of the rear bumper. Damage limited to the extreme edge and about 4mm deep feathering to nothing over about 1cm. The surface skin or glass fibre and whatever resin has breached. It is entirely of plastic resin construction.
The edge profile is something like
\ /
Unfortunately the damage is also highly visible plastic core is a very different colour to the paint :(
What does the team recommend as a flexible tough filler for such a small patch but in a highly exposed position and what should I do to ensure the best physical key of the repair to the substrate.
It is almost small enough that I am tempted to just use epoxy glue as filler but I am sure there must be something better and able to cope with being on a flexible plastic bumper. I had a look online and could find any dent/damage fillers that got decent reviews.
Any suggestions gratefully accepted.