anyone any advice on building a spray booth ,i need to build one for my mate.
or have any plans?
it needs to take a transit.
but will mainly be used for cars.

ebay turns up a few.....

speak to mark allanson-spraying legend...

NSDev has built his own spray booth in his workshop.

He may be able to give pointers - check out the retropower web site and you may see pictures of it.