Removed the winter cover today and the black line around the liner at the water level really hit me between the eyes. I REALLY want to clean that off this year but I have gotten stung in years past, buying the "guaranteed to work" stuff from the local pool supply dealer and finding out after a day spent scrubbing and getting sunburn on my neck that it works about as well as dishing washing detergent - which is not very well at all. Is there ANYTHING that will remove that line ?

Also, the aluminum liner cap is really worn and grey looking - is there anything that can be used to restore the original look ?

HELP !

Thanks !