Stop and think...

Bear in mind that you will need simply gallons of ink and it will cost you a
fortune (and non-laser printer ink disappears the first time you sneeze on
it, let alone take it outdoors).

A better route would be to download some free stencils, or print *outline*
letters onto thin card and cut out with a scalpel and then use as stencils,
with ordinary outdoor paint, and a roller or sponge.

Lots of free stencil forms on line:

http://www.google.co.uk/search?q=let...ient=firefox-a

S