I posted recently about how the top of the “Spider Table” I made 15+ years ago had developed a bad cup from the sun hitting the top surface and bleaching it out. This caused the z-clips to pop out so the table was loose, and it was rocking on the base. Not great.
I sanded the top to remove any traces of the old finish (and stains and deep gouges), and led it face down on the garage floor for a week. I misted it with water on both the top and the bottom once or twice during the week.
Yesterday I checked it, and guess what? It’s flat (well, flat-ish). The cup is completely gone, although there are some small waves in the surface. But it’s hugely better, the pictures don’t do the improvement justice. I can do a bit more sanding today to smooth out the surface and get rid of the coarse sanding scratches, then layer on more finish. I start with linseed oil, and probably spray a shellac topcoat next weekend.