Removing scale from fiberglass spa

Kcherrix123

New member
May 15, 2013
4
Chincoteague Island, VA
I’m sorry if this has been answered already. I searched the forums and saw blasting and remove scale from tile and hard surfaces, but not fiberglass spas. We bought our spa 7 years ago and this year, for the first time, after I drained it and wiped it down for the summer, I noticed a boy 45% of the surface
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
23,029
San Dimas, CA (LA County)
Search "no drain acid wash" up above. That's what I'd try.

You can't get in and grind on it and spritzing the empty spa with acid pretty much guarantees destroyed clothes, dry skin, and lung problems.
 
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