There are a few ways to troubleshoot this:
- Apply the polish in thin, translucent layers so that it dries evenly. Some sheer and pastel polishes will appear uneven after the first coat. For fuller coverage, always apply at least two coats.
- Use a ridge filler before applying the color. This will help even out the nail surface, which in turn will help level the polish to prevent a streaky appearance.
- Apply the polish with quick brush strokes. When you use slow brush strokes, you'll likely see streaking, as the solvents have already started evaporating and the polish is drying as you apply it.
- Do not over-brush. Going over the same polish you've already applied with the brush causes dragging and leaves the application looking uneven. Repeated brushing causes the bristles to make small groves in the polish.
- Shake and settle your polish. When polish hasn't been used for a while, the formula begins to separate, causing unevenness in color. Shake the bottle thoroughly before application to avoid this.