Lining the walls
Lining the walls involves taking a plywood panel, painting it with a light pva to water mix to make it more waterproof then sticking a foam to it called scrim foam. This foam is very light weight, acts as a sound proofer and natural insulator as it traps air in between the foam bubbles. It's got a nice feel to it and gives the walls a much nicer look as they look plump and soft and when you touch them they have a bounce to them like you would see in premium cars and boats etc. Then on top of the foam i mounted a grey thread material which was originally designed for sofa upholstery. These layers are mounted together using a high heat resistant spray glue. Once mounted together the ends are folded back under the plywood and stapled back. I used stainless steel screws with lovely stainless screw hole cups to mount the screws making them look more presentable.
This worked so well that I used this same method on every other panel i made for the van. I have a few pictures of the other panels here. I also made a window version which has a hole for the blind to be set in. This did not prove as difficult as i thought it would be as the glue is fantastic and holds the material very well. You just have to make sure you hold the material tight and stretch it onto the wood, if you don't then you get saggy parts and ripples. The glue really does hold the material on tight. I used a black lining for the rear of the blinds on the window parts so that when you look into the van you dont see the plywood reverse side, you just see a dark colour. The blinds have a thermal property to them and they are silver lined so they keep the heat in when they are down.