I recently sanded over 100sq. metres of old baltic pine, no problems. I then reluctantly used an owner supplied product called Bio Floor Varnish, start of big problems. Their system requires sealing with a linseed oil type sealer. Fine, but I didn't wipe off the excess oil after applying very thinly. How can you without walking all over a coated and wet floor? After drying I scrubbed the excess tacky mess off with a Canterbury rotary sander fitted with a scourer pad and lubricated with terps. No worries, left it for several days, dry and sealed surface, no tackiness. Then applied first coat of floor varnish, a Tung Oil based product, but not oil based polyurethane(oil modified), this product is basically all Tung Oil with a few additives. This coat dried and looked reasonably good. Waited 3 days then applied 2'nd coat of varnish. Disaster !!!!! The finish dried and looks as though light rain has fallen on it,the surface has a spotted or dimpled look throughout the entire job (this is indoors). I contacted the product manufacturer who denied any responsibility and claims high humidity and no ventilation are to blame. The day I coated was not particularly humid, but I did close all windows and doors as I normally would to avoid dust contamination. Has anybody else experienced similar problems and can it be remedied with a light sand and recoat and what is to say the same won't happen again? I dread the prospect of a full resand, please help.


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