If your paddling a wooden boat in whitewater your going to damage a chine. Especially if your boat is of the experimental type that does not have chine guards. (Ill be putting those on in a few weeks. What? I wanted to see how the performance would be without them.) Anyhoo i crushed in a five inch section of my chine while i was asleep at the wheel drinking hot tea.
When you remove the whole thing it will not look like this. the main part of the patch (over the wood and scarf) should have bonded nicely. Now the excess just needs to be trimmed off. I used a x-acto knife and a really sharp chisel. After the edges are trimmed lightly sand the area, then it will look like the above picture.