In all my years of boat painting and cleaning (Over 30)... I have never seen a product that cleanes waterline scum like "On-#^&#^&#^&#^& This stuff can be found at the chain stores and is awsome :buds: !

good stuff..just b carefull,,it;ll take the chrome right off your hardware.

i had to clean pools for the rich hollywood types out in CALI
and sometimes they were these beautiful babes sunbathing
in the nude as very nice as can be....which made you wanna do a real good job... :btu: we used some a little pool acid mixed with soap to take the oil and algae ring off the tiles...but it's very caustic and you have to be careful about splash back.

I use bartenders friend fiberglass friendly cheap@ dollar store