Ok, which brush size did you use?
Normally if you don't want any stripes you should make a selection of the place that you want to paint and then just take a larger brush size (max). That way you don't have to worry about every stroke being shown.
It depends on what you want to accomplish. In your case I would just add a fade or gradient, it would give you kind of the same effect.
using a selection and painting with a giant brush kind of defeats the pupose on painting with an effect. In my case im wanting to darken down the entire sky and just showing the triangle as an example to show the streakng. i dont want to have to make a selection and paint witha giant brush, i would like to paint with the effect like the tool implies i should be able to do. and im confused by what you mean by "Normally if you dont want stripes" becuase i have never had an issue with stripes when painting before... unless i missed a spot... which you can ealiy see is not the case in this instance.