I VTC this as off topic as it is clearly a question about automotive body work, and not about home improvement.
I received several arguments in the comments thread.
Of merit, was the question: What if the question was about cutting duct work? Which is an entirely valid argument.
In my opinion, sheet metal work is generally off topic, with minor exceptions when it is clearly part of home improvement and maintenance.
Would this question be ON topic if it didn't mention the van at all?