I should have mentioned it's in the bowl of the sink, in other words the porcelain is curved.
The film is not visible, but the area resists water and does not shine like the rest of the sink.
paint thinner & 0000 steel wool - just did the same thing w/joint 'tween wall & granite c-top only we had to remove polyurethane instead
The sealant as I mentioned is no where near the inner bowl of the sink.
I'm a bit curious how this "grout" got in the bowl in the first place? And what type of sink this is? Metal with an enamel finish?..ceramic? a touch of acetone and some 5 "o" steel wool should do it.
The silicone grout was used by an amateur who made the mistake of cleaning off the tools and/or hands in the sink after grouting. Have had this issue for years even though it has been scrubbed with comet etc. over the years. GE silicone is very stubborn. I'm not sure if the sink is enameled over metal or ceramic. It came with the house which was built around 1966 and otherwise is in pristine condition. It's pink if that is a clue.
PINK...ok are you interested in not having a pink sink? This could be the tipping point to swap it out.
There are chemical cleaners designed to remove silicone caulks...you might give one of them a try .
Have you tried denatured alcohol? You also may have staining under that area now...
KMS....THE BEST....THANKS FOR THE TIP!
no problem...let us know how it turns out
Update: local hardware store said goo gone was the same ingredient as KMS suggestion...tried that and no change. Just ordered the suggestion by KMS and will post result once it arrives.