I am in the process of refinishing 3 older mahagony tables and I am having problems with the tops. I have stripped the old finishes carefully and have sanded the bare wood thoroughly using a random orbit sander and sandpaper grits of 60-80-120-220 progressively.
When I applied the first coat of Minwax oil-based stain, I noticed dozens of pea-sized "craters" where the stain was not being uniformly absorbed. Same with the second coat of stain as well as with the three coats of Minwax clear satin polyurethane. On one top, I even went to 7 or 8 coats of polyurethane and the "craters" were still visible.
Any ideas as to what the issue is here? I work in an unairconditioned area that sometimes gets a bit humid, but I've been in the same workshop for 5 years and this has never happened before!?! Help!