Modelling related help

I want to create inclined pattern at the side of each stip.
Since its curve and irregular form im not able to do that in the fins.
I have attached an image were i have selected a face i want like that face on the side of each fin which i have shown above selection in that model.The above curved fin has 2m Height on both ends,but i want 2m at one end and tappering at a sharp point at the other end.
Can anyone help me with it

It would be best to start a new thread with this new question. When you do, attach the model in your picture so we can get you an answer that works with what you have built.

Yes i have posted it as a new topic.You can check there and i have attached the SKP File as well.Can you help me with it??