1 piece fiberglass inground pool question

[Ginna]

Greetings all,
My location is in Central NJ. We resurfaced our 1 piece 26,000 in ground fiberglass pool in 2006. The gelcoat we applied is showing cracking/
chipping on the coping and grey spots that bleed in side the pool. some areas still look ok and other areas seem to have a concentration of the greyish black spots.
For sure these are not algae. I've called at least 12 different pool companies and have not found one that will work on a fiberglass pool.
I am wondering what recommendations you all have. i was not able to find this particular topic with in your forum, although it is possible i overlooked it.
The task of sandy and resurfacing the pool was huge for the two of us back in 2006. Thank you in advance for your input/ suggestions...
Can other types of coverings be put overtop of the current surface?
With apprecaition!

 

[Texas Splash]

Have you considered contacting marine companies? Many of them have experience with fiberglass repairs & refurbishment. Could you opt to cover the shell with vinyl instead? I suppose so if you can get a company to make a good fit for you.

 

[JamesW]

some areas still look ok and other areas seem to have a concentration of the greyish black spots.

Cobalt stains​

Cobalting shows up as black spots on the surface.

Fun fact: It’s technically not a stain! The water penetrates the gelcoat, reacts with the resin, and creates a black byproduct. It’s caused by osmosis, so it's like osmotic blisters but...not...blisters. Oh.

How to Remove Stains from a Fiberglass Pool

Find a stain on your fiberglass pool? Curious about how to identify, treat, and prevent them? In this article, we discuss the colors and types of stains and how to remove stains from a fiberglass pool.

www.riverpoolsandspas.com

 

[JamesW]