It might if you're a first time painter and trying to do One Stroke. You need a good thick paint - almost tube acrylic thick - to do One Stroke effectively. So it will probably help you to use either the FolkArt paints that Donna recommends or Aleene's Premium Acrylics (another good thick bottled acrylic). Bottled acrylic paints are not all the same. Some acrylic paints have very little pigment and are thin & watery. That's why you are getting a muddied look.

Listen to kraftymom, she is right. The thicker the paint the better. Also, re-load your brush for each stroke, if you don't, you will eventually end up with all one color.
Vique.

Paint Petals

Just don't use Apple Barrel paint.....it's very watery.....

Vikki~~