New answers tagged finishing
Unfortunately it sounds like you will need to sand out the areas that are affected. If it has a coat over it, there's nothing you can do to retroactively that will fix the problem because it's effectively shielded by the top layer of finish. I think your problem might have been too course a grit on your sandpaper. I would use no courser than 280 or 320 for a ...
I just finished my first big stain and poly job, and I didn't like all the scratches that the 220 sandpaper was creating on each layer of polyurethane. Instead of sandpaper I tried cardboard, and it worked great! Got rid of bumps, created a smooth surface, and no scratches.
Without knowing the specific end use and history of the wood or the scale of the project I can only give you three general techniques and you can choose which one suits your needs best. Paste Filler. This comes in a variety of forms but essentially its exactly what it sounds like. It hardens to a sand-able surface, takes stain and finish more like wood ...
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