I've repaired a few boats like this.  I've tried alsorts to get a nice finish!  Using film over a large area is hard to stop wrinkles etc getting in.  The stretchy film might be better (wasn't available when I was repairing boats).  IMO the best option would be the coating resin but I did mine by sanding off the affected area, paint on a thin coat of resin (something like EL2), sand, coat, sand, coat....etc until you've got a good layer built up then coat and sand smooth followed by a final polish up.  This will make it as new.  You can do the build up part just in the gouges / cracks to save resin / effort until you have a level surface.  TBH though, your boat doesn't look too bad, I've seen alot worse!

As said above you need to sand back and start with fresh.  Release film is ok if you can get it flat.  Otherwise its build it up as FLD says and sand it flat and polish.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Great thanks for that.  Looks like its sanding time for me so !

Depends on ambient temperature but at 20C it should be tacky but firm after around 3-4 hours. However you should regularly check to ensure you don't miss the boat - pun intended!

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Boom boom ! ...give me time to rest between coats.

I work on the evening / after work schedule so I sand and coat each evening.  This gives it 24h to cure before you sand again.  Not a massive effort and it's surprising how quickly it builds up.