I have a VW camper that i plan to repair this summer and use as an outside broadcasting unit with my logo emblazoned on it, when its done i'll post a photo, that reminds me i need to learn to weld!
Muah ha ha haaa.....
See that TINY wee 1/2" hole in the air duct that just needs a bit o' platin? Off to the sheet metal workers with you and bring back an 8'X4' sheet of steel.... Should
just about cover it... Trust me, I've been runnin old wrecks (sorry classic cars

) for over 25 years... And am off out into the sun in an hour or so to mess about with yet ANOTHER fault on my old 924...
I did actually consider using a Morris Minor van and getting it done with old-fashioned painted signwriting.... I was worried about the reliability of the thing though; 'specially since I often find myself working on building sites and in industrial areas... SI or SII Landrovers being too dear to run...
And that brings us more to the point of not just having the vehicle signwritten, but having it done well... You can buy a bunch of sticky letters off 'ebay' and DIY it.... But is it better to have someone properly design the livery and get it properly cut and fitted?