http://www.cultpens.com/acatalog/Pen...ine-MFP5N.html
Dunno where you'd find one of these in the US, but they must be available in art or graphic design suppliers.
They are great for use as is, but you can also get the paint to come out as a thin fluid and apply it with a fine brush for even finer control. If you can get it on wet, so that it flows to cover where you want, you can get a very shiny chrome surface...
bestest,
M.