About 30 years ago, I purchased and finished an 'unpainted' oak table. At the time, I stained it an american oak color and finished it w/ about 20 coats of handrubbed tung oil...yes, really..about 20 coats. It was a Formby product, and I'm almost positive it was a 'tung oil finish'..not pure tung oil, so it was likely a varnish. It is my dining room table that is only used infrequently and still has good water repellant quality. Now I want a darker finish..and I'm wondering how hard it would be to remove this finish? a good sanding? messy strippers? Ain't gonna happen? I can afford a new table if I have too..but still like the style and functionally of this one... I don't want to ruin it, and would prefer to pass it on to relatives if this is gonna be really difficult...any advice?