Timber floor finishes

i am not sure if this has been covered before, i did check out this section. I am at the stage now where i am looking at doing the timber floor in my lounge room. The lounge room IS the origonal house, circa 1920's, that's all there was for many years. The floorboards are the same ones layed down when the then holiday house was built. I have heard that some 2 pack finishes can actually be "dented" or marked by pressure from such things as tables, chairs etc. Is this true and what is the best stuff to put down. The boards are the wide, real, Tassie Oak.