I have an oak coffee table with several coats of polyurethane. It has cured for several months. When I rubbed out the finish I can still see surface scratches in bright sunlight. How do I get rid of these scratches?
When I rubbed out the finish I can still see surface scratches in bright sunlight.
Polishing is a process of replacing big scratches with small ones, and then replacing those with even smaller ones, and so on. That's why we progress through abrasive sizes: very fine abrasive is too small to remove the scratches from coarse abrasives in a reasonable time.
How do I get rid of these scratches?
If the scratches are very light, more polishing with fine abrasive. If the scratches seem deep, then it may be that you proceeded to fine abrasives too quickly and you'll have to back up a bit to something less fine in order to remove the scratches, then proceed through the finer grades again.
If you think the scratches that you're seeing are from the finest abrasive you've used, then you'll need to move on to something even finer.