As soon as I opened it, I noticed the terrible brush, and when I used it, I saw that this liquid is 10 times worse. I tried it 4-5 times with different nail polish and base to make sure I wasted my money again. I applied it over the polish, and even though it was almost dry... as soon as this liquid touches it, the polish becomes liquid again... after 25 minutes, all the material on the nail still moves like a sticker. Moreover, after it finally dries after half a century, know that the next day you will have to do all of this again from the beginning because it does NOT actually harden, it peels off, scratches easily, and becomes dull (no, I didn't wash dishes in the meantime). Also, if your polish has any shimmer or those glitter powders or something sparkly, this liquid tends to pull them up and makes the manicure rough.