The first step is to remove all the original “interior” of the van and everything the former owner put into it. There are very thin wooden sheets at the walls and some airline bars. I removed everything and I cleaned up the whole van inside. Found some stuff ;c)
Some of the old sheets were already brocken. So most of it is not usable anymore. To remove the airline bars I had to drill every single rivet. Most of them were aluminium which is easy to remove. Some were steal and it took me hours to remove the bars without destroying the whole van.