Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Will it get the yellowing out of the fiberglass?
Document: I got this hoping to get out some stains around the pool walls. It's not labeled except for boats but I figured fiberglass is fiberglass, It may work for a boat but not for pool walls! However, shipping was fast and packing was perfect.. Bottle didn't leak.
Works wonders on the fiberglass and won't harm the gelcoat!Make sure you are in a well ventilated area! Where a mask, gloves and eye protection as this stuff is wicked.-just spray on and it starts working instantly on the brown scum line caused from sitting in the marina.Hose off to a clean shine.
Wow...it perfectly cleans any marine residue from fiberglass...also cleans the bottom paint (or separates the copper out). Yes it is acid...strong acid. Surprised there are not more restrictions on this stuff...but I love it. Wipe on rinse off...on and off....yes that covers it...although  protective gear is a MUST. KIDS keep away.
Spray on, brush a bit and rinse off. Works amazingly well. Don't breathe fumes or get on skin. It is acid.
just spray on and watch years of river grim come right off....it is toxic so don't get it the mist or breath it..wear some gloves and it will amaze you
Be careful Wear gloves and eye protection. Its a acid and try not to get any on you,and try not to directly breath the fumes, area should be well ventilated. Follow there directions.
This is the first time my husband used this on an older JetSki that had been totally neglected by its previous owner. The ski had been left floating in a rather filthy river for over six months, and the crud on the hull was at least 2 years old. It only took my husband 10 to 15 minutes with very minimal scrubbing to get it looking super clean. He had tried other products and tips from other boaters like to use Sno-bowl (for toilet cleaning). Nothing really made any improvement.
This stuff works like magic and is worth much more than I paid for it. I had my boat in a MN lake for a week in early July. It left a dark brown water stain that I didn't get to for almost two months. I first tried a tough floor cleaner. Nothing. I then tried the toilet bowl cleaner method. Nothing. Bought this and applied with a paint brush and you could see it disolve the stain as soon as it was applied. Simply applied and washed off.
unbelievable results! No rubbing algae whatsoever! I should have used this product years ago. Just pour some in a bucket (full ystrength) and paint on with a throw away paint brush. It eats it up immediately. then rinse off with garden hose - not even a pressure washer isneeded.
there is absolutely no doubt in my mind that this is the best boat cleaner I've ever used! it completely removed any rust stains i had on my boat plus more without having to use a paint brush to put it on, but DON'T let it touch silicon, plastic, or rope, lol it will eat em up, i would recommend anyone to buy this product and i will send people to this link. :)
Answer: yes