Campervan painting help please.....

[Little Toast]

Just a bit of advice on quatities of paint to start please....
Its a 1972 crossover vw camper bay and shall be painted pastel white top and mouse grey lower, divided in the usual place just below the windows.
The doors, boot and engine bay will be removed and painted inside and out and the exterior only of the bus shall be painted including door shuts.
The question is how much paint in litres in the white and grey should I need/order (I'd like to put a decent amount on) but am running a budget here, any help gratefully accepted.

[santona1937]

combi colour- around three litres/four total. Also possible to hand paint with it, if you do a good job its just indistinguishable from spray. There is lots of info on how to roller paint with it.