There are three types: in-ground pool with vinyl liners, fiberglass and concrete.
Personally, I wouldn't apply fiberglass coatings because I don’t want to inhale the chemicals while applying. Methyl Ethyl Ketone, or MEK (no Bueno) is the catalyst that creates isophthalic resins. It is probably safe to roll epoxy. You should be aware of possible fumes or gases when coatings are applied in unventilated areas.
Most pool surfaces will require a specific primer epoxy before applying the refinishing solution. Apply the primer following the instructions on the package, using masks and gloves to block any harmful fumes and chemicals. Paint the entire surface of the pool with the primer and let it dry entirely before continuing. This process should take about two to four hours, depending on the size of your pool.
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