Long story short I have insulated the interior of my stock trailer and now I need to "skin" the interior to hold the insulation in and give it a cleaner look. It needs to be able to hold up to the weather but other than that anything will do. I've found some 4x8 plastic bathroom wall panels for $20 at lowes, but was hoping our brain trust here might have a better / cheaper idea. Thanks in advance for any and all help!!!