Pool ledge is rusting!  If I replace it with your product how can I keep it from rusting again. Number 145-0882 and number 154-0881. Also do not know what are considered straight and what are considered cCurved? Is it just the end of my pool on each end considered all curved?

I Have a Brisbane 15 x 30 above ground pool purchased in 2011.What is the difference between curve straight and transition? This is real reliable