First I am not a fabricator but have over 30 years experience as a home builder. A couple of comments on Granite. First in this forum like many granite is talked discussed as if it is a commodity - all granite tops are created equal. Granite is not like salt or soy beans. There are many grades of granite and the prices vary widely many with similar or even the same names. There are also many levels of fabricator from the sophisticated fabricator using computer operated cutting and polishing machines to the guy who will literally cut granite in your back yard. I was at a "shop" the other day where they were cutting granite with a hand saw on 2x4's in the parking lot. Many new fabricators were working for someone else and when the economy slowed they were laid off. These employees then went into business for themselves often without proper financing or even proper tools. The prices fell as these fabricators using lawn signs to advertise and working for wages and cutting corners: waxing edges instead of polishing, using mismatched remnants, dyeing granite to make it look more expensive, cheap uncertified give away sinks, and other tricks that do not show up until the check clears. Radon is pretty much a non issue but check it if you like. Do not buy from a fabricator unless you have seen the shop and the equipment they are using. If they have their own slab inventory it is a good sign that they are better off financially. Reverse look up the phone number. If it comes up a cell phone and they fabricator does not have an office look out. Many of these guys change numbers often to avoid warranty. Yes all granite should be sealed. Darker granite will hide the absorbed water but still needs to be sealed. Quartz, solid surface materials and even the composite sold by Granite Transformation have advantages and disadvantages. First they are more uniform because they are manufactured product. The is no such thing as a B or C grade quartz. These product do not have the veining and character as granite. Here is a link that might be useful: ANO Sales

The manufacture won't be able to help you here as that manufacturer is Mother Nature. The fabricator won't be much help either, as the stone is performing as is it's nature to perform. It's a well known issue that honed black counters show every bit of oil based touching and hold on to the oils in their texture. I'm surprised that you didn't come across this information in your research for your counters. Sealing doesn't really help, as the culprit isn't the porosity of the granite itself, as black granites are almost completely non porous. The issue is the honed texture that traps the oils. It's the difference in a wood surface sanded with 80 grit sandpaper and 150 sandpaper. One has more surface area to grab you because of the coarser finishing. Black granites are dense enough that sealer won't penetrate and can actually exacerbate the "stain" issue. Some people have had good results from removing the sealer and then using Method granite cleaner, as that puts down a silicone oil coating that minimizes the appearance of oil stains. It is supposed to be safe for food contact surfaces, but I wouldn't make a sandwich on a counter treated with it.

Industry standards say that no more than 10" of 3cm stone can overhang without support, or no more than 6" of 2cm. You have received multiple cautions that your situation exceeds industry standards. If you choose to ignore this, then when the inevitable break does occur, you will personally be on the hook because you have been made aware of the hazard. Insurance will not protect someone who knows of a danger and refuses to rectify it. It is the same as if you refused to put a fence around your pool and someone drowned. Your home and personal finances would be subject to loss. Fix the damn overhang with some support before you lose a foot.

Fisrt thing you need to determine is what your counter material actually is. Laminate stains very well may not come out (bleach products may remove the color completely) and would be treated completely different than, marble or granite or quartz or solid surface. All may require differetn steps and or processes. Pictures would help as well.............................