Does anyone have any tips for installing a Faux Oil Tank/Electronics Box?

I always thought that if I were to make one I'd use PVC pipe .Two pieces ,one cut  short for the outside ,and both cut down the side to remove a section for access ,the shorter one slid over the longer  ,which would have end caps then glued in place,the shorter piece could then be rotated ,much like opening a rolltop desk. Light weight,and with a light sanding paintable.Wires could be fed in from the bottom and simply sealed with silicon ,no danger of contact with a metal tank .