I need a Airbrush color printing solution

I need a airbrush color printing solution which could print on large size surface with oil paint, and got about 64dpi resolution or higher.

Does anybody have cheap solution like this?

Thanks,

Define large! :-)
Length? Width?
How many times do you need to use it? oil paint is going to clog up a lot of systems
And how much money can you afford?

There are already commercial solutions for printing billboard signs (50 feet by 20 feet), but they are expensive.
There are plotters that can print 4 feet wide by how ever long you want.