We are looking to paint some existing wood floors in our 1901 farmhouse. They are painted dark brown.

Is it a bad idea to paint them white? A friend told me all the imperfections would show through. I have a room where the floors are painted gray, but the room still looks pretty dark.

I was hoping if I used a wood filler, sanded, primed, painted and added a polyurethane coat, white would still be an option.