Without a picture, we cannot intuitively judge what “similar scratches” look like.

Let me tell you some experience

To polish hardwood, sandpaper is generally used. Of course, there are many methods nowadays, such as sponge sand blocks, DuPont flower heads, etc. But no matter what abrasive is used, it is a process from coarse to fine. Use sandpaper to explain: the first course of sandpaper (such as No. 180) is the coarsest, and the purpose is to remove the knife marks of the processing tool (there may be some auxiliary shaping, burr removal, etc., if the tool processing process is not fine enough), At the same time, the wear marks of this sandpaper (No. 180) are left, and then the second sandpaper (such as No. 320). The purpose is to remove the wear marks of the first sandpaper (No. 180), while leaving the second sandpaper. The abrasion marks of the sandpaper (320 grit), then the 3rd pass. . . . . . Wait, each pass of sandpaper removes the grinding marks left by the previous coarser-grained sandpaper while leaving its own grinding marks (finer-grained), until it is as fine as you need (such as No. 2000, at this time The light should be discernible), and then, if necessary, you can use a cloth wheel, wool wheel or something to polish it, or wax it.

Looking back at the question, I found "similar scratches" after polishing. Possibility 1: This is because the grinding marks of the previous sandpaper were not completely eliminated during the polishing process. The reason for this may be that the polishing process is too hasty and not patient and careful enough. If not, it must be that the "number jump" jumps too much. For example, it is okay to use No. 320 after No. 180, but directly go to Number 600 is too many jumps. Jumping too much means spending more time grinding, which is inefficient. If you jump directly to high numbers (such as 320 followed by 1000), you won't be able to grind it out no matter how much time you spend; Possibility 2: There is a problem with the polishing tools, such as there is grit or dust on the cloth wheel, or the polishing cloth you use is actually coarser than the last sandpaper;

Thus, the questioner first Check whether the polishing tool is clean and whether there is any dust. If the problem with the polishing tool is eliminated, carefully observe those "similar scratches" to determine which polishing process may be causing the problem, and then return to that process and start again.

Let me say it again: 1. Be patient and careful when polishing; 2. Try not to "skip numbers", haste makes waste; 3. Polishing tools must be clean