Gelcoat pool application can only be done in a factory environment. Instead, there are replacement coatings--thermoplastic polymers that are used to resurface fiberglass. Before the new coating can go on, the pool should be completely drained.
It usually takes 5-7 days for pool resurfacing to be completed. Sometimes, the process of pool resurfacing can be hampered by bad weather and can take up to 14 working days.
Unfortunately, gelcoat pool applications are a factory process and cannot be reproduced in your backyard. Instead, there are replacement coatings--thermoplastic polymers that are used to resurface fiberglass. Before the new coating is applied, the pool must be fully drained.