I think so. If it's a hollow glued up stick you might be able to soften the glue and straighten it before gluing it back in shape. For any stick cut...
I have one my Dad made. The blades are painted, in between is either oil or wax, maybe both. If wax, it's probably beeswax. The wood hasn't darkened...
Very cool! I've built a couple of Glen L boats (sailing dinghy and kayak). I love the sort of vintage DIY look they have. I'm also a sharpie dreamer....