I have recently bought my grandparents house - and would like to spruce up the cork floor in the living room. The floor was installed in the 50's and is square cork tiles. It is still well attached to the sub floor. It is largely still in good shape, except for an area that is around the exterior door that is more worn.

Should I just wax the floor several times? Or could I do a polyurethane seal? Would that be better for the floor in the long run? And should I / could I buff or very lightly sand the floor before hand?

Thoughts and opinions very welcome! Thanks in advance!