LOl- takes quite a bit of rubbing to start removing paint.. the clear protective coat comes off first anyway on these games. If you feel a lot of friction as you rub.. pull up, dry off and take a look. With the planking... this can be made invisible with a very light spray of the same colour.. i mean very light, but to get the dirt out, use the eraser in line with the planking.. it will lift quicker and with less work.
Also, most people just get eraser.. add some meths etc or whatever is being used and start rubbing... this is nonsense as you then have to rub before the dirt has had time to dissolve!
After all if the meths etc hasnt reached the dirt then no amount of magic anything is going to lift it out.
Apply meths ( sometimes i use neat Sugar Soap) to the area on the PF and let sit for a few minutes... it has time to penetrate then and begin to dissolves the grease etc... THEN start with Magic eraser and it will lift so so much quicker