A fiberglass coating is something I would not apply to my skin. Methyl Ethyl Ketone is the catalyst for isophthalic compounds - no Bueno An epoxy is safe to roll on. Be aware of the fumes and gases that can be inhaled when you apply coatings in areas not ventilated.
Resurfacing a pool is not an easy DIY job. A small error can result in a leaking pool which can cause serious damage to your home and backyard.
Also, painted pools get dusty and often don’t bond long-term to the plaster underneath. If your pool is already painted and needs to be repainted, you could do it yourself. If your pool surface is old plaster, I would highly recommend re-plastering by a professional company rather than painting. You won’t be happy long term if you switch your pool from plaster to paint.
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