These are "dimples" they "pop" back out! These are not permanent, they are NOT defects, they are not "damage". If this was oak, you would have added "character" to the floor = permanant damage.

Try using a HOT WET CLOTH, and put it in the microwave for 15 seconds. Using an oven mit, place the super-heated cloth onto the dimples and let it rest until the cloth is cool to the touch. Remove and evaluate the floor.

Congratulations...you have just discovered the "memory" that cork possesses. Cork is the "trampoline" of hard surfaces. It compresses and rebounds. The finish on WE cork = NORMAL for cork. The finish MUST BEND AND TWIST with cork. If you put a hard, brittle finish on cork (like Wicanders and Torlys) you end up with a cracked mess that hazes (turns milky) in a few years.

A cork floor is the softest hardwood on the market. Like ALL HARDWOODS it requires occasional maintenance. This maintenance requires you to ADD FINISH every 7-10 years depending on the wear. A low impact home with a low quality "urethane finish" cork means the finish must be reapplied every 2-3 years. A high end polyurethane finish means the refinishing needs to be done every 7 years. That same finish in a low traffic home = 10 years.

The N. American mind set = tough = hard. Cork is forgiving and durable...in a different way than hardwood. Remember: if you are left "unphased" by dents left in a carpet (a carpet leaves more dents than cork...something to think about) then dimples left in cork shouldn't upset you.

If you have the personality that insists that everything needs to look perfect, for decades without any form of "living" showing on the floor, then ceramic tiles are the perfect option. I know many people who love cork for the quiet comfort of it...it is easy to keep clean and is lovely to walk on in bare feet. I also know several people who wanted all of those things but could not "handle" the small dimples things would leave behind.