Do root touch-up sticks/brushes work well for a thin hairline?

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I'm considering getting one of those root touch-up sticks with a brush applicator (for covering grey roots between colorings). My concern is my hairline — I have thin/sparse hair right at the forehead, so I'm worried the color might look patchy or too solid/fake there instead of blending naturally with the scalp. Has anyone with a similar thin hairline used this type of product? Does it actually blend well, or does it end up looking like an obvious block of color? Any brand or technique recommendations welcome! https://preview.redd.it/987zknrky4gh1.jpg?width=326&format=pjpg&auto=webp&s=3bf6faa108166ad8b5c43751273bd081caf07641   submitted by   /u/ThroatOk2114 [link]   [comments]