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Re: Can bleach damage FRP
Long term and warm to hot Clorox (Sodium Hypochlorite) will begin to damage the polyester component of FRG; but, well beyond what a consumer with a bottle of laundry bleach can do.
Dilute Acetic Acid (vinegar) will kill/stun many microorganisms .... leaving the 'dead bodies' for successive species to use as their nutrient source. Go to any peat bog or rain forest and measure the acidic content of the soil, etc. where such microorganisms thrive - high acid content! Ditto, for many industrial fermentation processes where the acidity is kept high. Sodium HypoChlorite will begin to readily attack stainless steel or plain steels ... chloride ions.
However, there is an analogue form of Acetic Acid (perAcetic acid) when mixed with high potency Hydrogen Peroxide will kill 'everything' (including human tissue) leaving the surface almost completely sterile.
Strong caustics are preferred for cleaning microorganisms as such dissolves/liquifies the cells - TSP, Sodium Silicate based detergents, LYE soap, etc., etc. The reason caustics are better is that they dissolve 'down through' the sometimes thick bacterial colonies (calcyx slimes); acids, etc. only kill stun the surface and dont penetrate through the 'built-up' slime for a 'total kill' leaving viable organisms below the surface to reinfect.
When cleaning with caustics, after you scrub and rinse, if you reapply (wipe on or spray) the caustic and let it dry; any fungal (mildew, etc.) spores that then comes in contact with the surface will be inactivated - such would be the modern equivalent of 'white washing'.
Dont use caustics on non-epoxy paint, oil finishes nor varnish.
Last edited by RichH; 03-03-2015 at 08:37 AM.