I have a vinyl lined pool with steel walls and a concrete bottom. I converted the pool to a hybrid last year by removing the liner, adding a 12" tiles border and fiberglassing all seams and then painting on a high build epoxy. I have an adhesion problem but only in areas where I had done concrete repair. I waited 30 days for most of the repairs before coating but was a bit short on others..... Big mistake I think. I sand blasted the entire pools did what I thought was an excellent prep on everything.
Bottom line, I need to recoat! I like epoxy but reviews are hard to find, anybody know Ultraguard?