Concrete and concrete stamped release stuck/stained Fiberglass Pool

Kkeebler7

New member
Jul 30, 2020
2
Raleigh, NC
I recently had my pool deck installed with a stamped colored concrete border around the pool and then brushed concrete for the pool deck. So the stamped powder release they use to darken the stamped concrete has stained the perimeter of my fiberglass pool around the top of the walls (almost like a ring around the water line). Has this happened to anyone else or anyone have any ideas on how to fix this? Some sort of pool cleaner that helps or something non-abrasive that won’t affect the gel-coat, but will remove the stains? Thanks!
 

Kkeebler7

New member
Jul 30, 2020
2
Raleigh, NC
I will definitely try the magic eraser. Yea some of the stains are dried film of the concrete where other marks are droplets of the concrete that is now adhesive to the fiberglass. Any tool or mechanism that could be used as a scrubbrush/scraper to release these hardened spots without affecting the integrity of the gel coat?
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
33,058
Laughlin, NV
Concrete will dissolve with acid. Try diluting some muriatic acid to 5 or 6 to 1 with water and spraying or sponging that on the concrete.

Be sure to wear eye protection when using acid.
 

JW1

Well-known member
Sep 4, 2019
171
SW Ohio
We have used a magic eraser to clean the grime and pampered chef scraper to remove what was still adhered.
 

Supuldn37

New member
Aug 12, 2020
1
USA, Illinois, Chicago
I will definitely try the magic eraser. Yea some of the stains are dried film of the concrete where other marks are droplets of the concrete that is now adhesive to the fiberglass. Any tool or mechanism that could be used as a scrubbrush/scraper to release these hardened spots without affecting the integrity of the gel coat?
can you update? really interested in the results.
We have used a magic eraser to clean the grime and pampered chef scraper to remove what was still adhered.
and the result? is it really "magic" or we should opt for something else? thanks