airbusdrvr

I have a St. Croix(kitted by Cressline) 1/5 scale Long EZ kit and have two questions for anyone with experience/knowledge about this discontinued kit.

First of all, IS THERE A SOURCE FOR A REPLACEMENT ENGINE COWL? The upper half of the two-part cowl supplied with the kit is defective. In the picture below is shown an area of the cowl that is paper thin. Both the upper and lower cowls are very solid and about 3/32" thick except in this one area. Somehow, a piece of defective plastic/acrylic material was put into the mold. Out came a perfectly formed but very thin area as shown below.

The second question has to do with finishing the model. The wings halves are assembled in three sections using foam cores covered with 1/16 balsa sheeting. The three sections that comprise each wing half are joined using 2oz fiberglass. The only "wing spars" are actually 6 1/2" long plywood joiners that attach the two wing halves in three places at the center section. The fuselage construction is standard balsa and plywood. After this, the complete model(wings, fuse, solid balsa control surfaces, etc.) is covered with 3/4 oz fiberglass cloth. Then follows all the filling, priming, painting and sanding associated with fiberglass construction. As stated in the manual, this method of covering will add to the structural strength.
THE QUESTION: If 2 oz fiberglass is used at the wing joints as specified, could plastic film, like Ultracote, be used safely in place of the 3/4 oz fiberglass method of covering?