I just read back and worked out the tent is to keep the dirt INSIDE not to protect the project car. I'd assumed it was "a clean space".
Yes, indeed David
I share the unit with a friend and we mostly park our classics in there, I manage to cover mine but John doesn't manage to do his cars. Sanding down and the associated mess with grinding and welding would create a fog of dust and dirt that would mess up the cars, even covered cars. So the dirt will be contained!
I may end up respraying the Flavia in there in the end, I have now added a dust extraction fan so it's not beyond me to do so.