After completing the fiberglassing on the exterior of the camper, i moved to the backwall to complete the glassing in that area. My rear wall on the camper is a piece of 3/4" plywood with the exterior side of the plywood having been coated with three coats of 635 Thin Epoxy, medium set. This waterproofing also creates excellent bonding when the cloth corners are being lain.
If you have read some of my earlier posts by chance, you have discovered the reason I chose to use the plywood rear wall was primarily due to a panel shortage on the panel purchase order. To purchase one more panel would have cost me $300 + shipping, plywood is $36.00. Plus the plywood will provide the necessary structural facet needed to accept fasteners for the door hinge, striker plate and bolt, bike rack on exterior. Furthermore, since the rear wall is plywood, I can simply tack on some 1" firring strips which will act as studs to aid in hiding electrical wires behind paneling on the interior.
Also, i can easily mount other accessories on the interior of this rear wall as opposed to mounting apparatus on thin fiberglass skins. This rear wall will be painted thoroughly when I get around to that portion of the project.
moving on inside of the camper to rough-in the shower area next