i have oak flooring that is blond in color, i varnished it with spar varnish, approximately fifty years ago,it still maintains its color,though are some areas that have begun to darken with age.
My problem is: somehow a wet rag got left on the varnish, in area which very visible to visitors coming thru the front door. the area is splotchy black and circular spirals of brown
I think there may have been pepsi in the rag. i have tried everthing to remove the stain
Never use beach on varnish! just makes it blacker , to my dismay!
i have, already, made a mess!
other than going to bare wood!