Need to paint the bus

[rgG]

I wish I was close enough to help. Maybe you could duck tape large sheets of colored plastic over the bus, sort of a Mondrian effect, until you get it painted. Painting with a grey house paint seems like it could lead to problems further down the road. If you are going to paint, paint it with a primer so that it at least will stick to what is already there or use spray paint, that too will stick. Trying to put a latex house paint over that Bus enamel is not a good idea.