Commercial cowl is not available so I must dupicate the cowl from my friends plane. This worked out well since the original cowl was already cut and my friend plans to change engines. So I need to make 2. I found the work below very interesting and decided to try this method using Ultracal 30 from US Gypsun.
I filled in the cutouts in the original cowl and use it for the plug.
www.youtube.com/user/sevarg7226#p/u/44/DkrRybDx5Y4
The results provided acceptable results at considerable time saving verses laying up a epoxy mold. Not perfect but compleetly accepable.</p>