we have a 3 year old saltwater fiberglass pool that has developed some type of shadow/scale????


New member
Aug 15, 2017
Monroe, NC
we have done the muriatic acid test and used wet/dry sandpaper (1000 gr) as instructed by out pool manufacturer and when sanded the color is under the shadow/scale substance! we are getting ready to have ecofinish (polyfibro) done to pool! Has anyone on this site familiar with this process?

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Welcome! :wave: I have not personally had the ecofinish done, but you might look at the following thread. A couple of those members have had it done with what seems to be mixed results.