Here's the sign I mentioned working on previously. 

 

It's painted primarily with Golden brand Fluid

Acrylics, which were a nice consistency for 

the flowing lines and small brushwork.  

This brush, which I bought on clearance several years

ago, came in very handy. The store display had it labeled

as a sign painting brush, and it turns out to be just that!

The brush is cut at an angle, so it holds an adequate amount

of paint while coming to a precise and swirlable point.