Go back to my last post and go through the tutorials on that site.

The wax is to fill in small imperfections on the original piece, and to start the release process. You don't want the resin to have anything to grab to. If the resin has a chance to grab to your cowl you might loose both the original cowl and your mold.

The Gell coat is basically a layer of resin that is allowed to gell before the glass is started to lay in. That is so you have a perfectly smooth surface to form or paint to.

http://www.cstsales.com

Go back to this site and reread all the tutorials. There are instructions for making molds, and also for forming parts from the molds. They even use a cowl as their subject so you should be able to follow right allong.

They also have the products for sale, and have kits available with everything you need to produce the molds and products from the molds.

Even though you are planning to prime and paint the cowl you still want it to be perfect. Paint will show any imperfections of the surface. If you have a perfect cowl, you won't have to use primer/filler, and be able to keep it light.

The more work you do to the mold, the less work you will have to do to the cowl.
The more perfect the cowl the less work you will have to do to prep for paint.