Any tips for repairing a fibreglass bruise.

On my last trip I met a very large pot hole on the road, couldn’t go around it due to oncoming traffic and couldn’t stop in time as I spotted it too late.
My car hit it with a bang and then all I saw in my rear view mirror was the boat and trailer in mid air and they came back to earth with a awful thud ( a little exaggerated but that’s how I still see it, I am sure you know how I feel)
The Fiberglass hull took a bad knock and part of the problem is that my trailer has only one roller on each side which puts a lot of pressure on one small point of the boat when towing. I will be looking to change this roller to a long rail before I travel anywhere.
We launched the boat on the day anyway and as I suspected the boat seeped a little water through the bruised fiberglass.
Now this won’t be the first time I have repaired a fiberglass hull but I was wondering if anyone out there has any tips for making the job as neat and as strong as possible?

YouTube loads of videos there, I'm sure you can find some useful repair hints and advice. Hope you have good insurance cover

how bad is the bruise.. has it gone through the gelcoat and the fibre...and how big of a area is it.. pm me i might be able to help....