Centreboard missing tip

It can be found here, we always take some to events for quick repairs: http://store.magicseaweed.com/Epoxy-Repair-Stick/Item/116/

I used this stuff intended for surfboards to do mine. Can't remember what it was called, I'll try and find out. It's basically this epoxy type stuff, comes as a green cylinder with a white streak down the middle (like a stick of rock). You slice a bit off, roll the two colours together and then jam it into the damaged area. Hardens and then you just wetsand it down. Really good stuff, I had no issues with it. There's no point in doing a complicated, length repair for something like this because you're likely to do it again. Unless it's your best set of foils that only comes out for the nationals, you're better off with something quick and easy that's going to get you out sailing quickly! :)

I do like the fact that it can be used under water. Some are better than others, though, aren't they? - are the £ shop ones really any good? - I've not tried.

Polyester filler goes off in 15 mins, so not too slow.

Polyester filler will fall out at no faster rate than epoxy filler on a job like this. (ie, when you next plough into the bottom) It even comes in white, and from B&Q.

To be quite honest, if its not a very bad bash, I sometimes just get ordinary shop araldite out and build it back with that. Its got too much silica in for ordinary filling tasks but for a board tip that you'll probably bash again its awfully convenient.