I recently skinned over some of the windows and doors on our bus.
I did not have any two windows in a row that we wanted gone (it is a short bus) but we did cover up a fairly large door. It ended up being 5 feet by 6 ish feet roughly. It was quite hard to handle that big of a sheet but with enough hands it went fine and I am very glad it is all one sheet. I could be wrong and I'm sure some skoolie veterans could school (the pun was completely intended
) me on this but if you go with a bigger sheet covering more windows in one continuous piece of metal you will have less seams that eventually could become points of water entry into the bus. This was my reasoning to go with covering the most I could in one sheet. I would be interested to hear some other reply's though