I tend to paint WM similar to Dave's method.
If you want to speed up getting troops on the table, then paint the front rank strips, and glue them to bases.
If you really want to go for volume over looks, then get a spray can of the main base colour for a unit, spray in this base colour, add flesh and weapons and armour. Then wash.
This will end up rather mono-chrome, but you will get through a lot of stuff.