Hi,

Yes, the stains can be removed either by DEEP CLEANING using chemical and scrubbing machine or RESURFACING with diamond grinding pad and then polishing with BQ Nano. The price ranges from RM2.50 to RM9.00 depending on the severity of the stains. We've been doing it for many years now and we are the handful of company in Malaysia that can do it 'right'. We have many success stories and happy returning customers, feel free to check out our website or FB. and here's a recent one we did for fellow forumer here in LYN.
https://forum.lowyat.net/index.php?showtopi...floor+polishing

If you want to DIY, we do equipment rental and selling the required materials/chemicals needed to do the job.

please visit our website www.brightquantico.com or our FB page www.facebook.com/brightquantico
whatsapp me for any enquiries 0122322666

We do ALL sorts of floor restoration, from natural stones, concrete, cement, tiles, carpet, hardwood and whatever you use to cover your floors. We even do facade/external cleaning.

Bleach or acidic floor cleaners can cause that. Especially cleaners with no experience. To them it's always the more (cleaning solution) the better. the rule of thumb is always wet the floor before applying cleaners. This is something they fail to do and home owners have to pay for their mistake.

Tiles in general are very easy to take care of, compare to natural stones. cheap to buy and install but expensive to restore. Tiles in general are very hard. The hardness is comparable to that of granite. Hence it takes a longer time and more diamond sets to grind off the stains and that leads to higher cost. time is money.

Do whatsapp me the pics of your problem, consultation is free. and so is our DEMO.

This post has been edited by six66: Sep 30 2016, 10:37 AM

Yes... just use a knife and cut the grouting. Then regrout the color you want.
It's tedious but diy-able.

its called etching. yes it can be restored but the cost is higher than replacement. please do not use high alkaline or acidic chemicals... it will worsen the problem.
you've got 2 choices - replace or restore.

please visit www.fb.com/brightquantico.com for my past projects.