WHOA! I was curious about Whink, so I just googled for their MSDS (which must tell you the ingredients). The active ingredient is hydrofluoric acid. That is a serious and dangerous acid. It dissolves glass (so it may not be good for your sink). More serious, it is harmful to YOU. It does not "burn" your skin, like hydrochloric or nitric acid. Rather, it is more pernicious. It penetrates your skin and does nasty things to your innards. From: http://web.utk.edu/~ehss/training/has.pdf Hydrofluoric acid (HF) differs from other acids because the fluoride ion readily penetrates the skin, causing destruction of deep tissue layers, including bone. Pain associated with exposure to solutions of HF (1-50%) may be delayed for 1-24 hours. If HF is not rapidly neutralized and the fluoride ion bound, tissue destruction may continue for days and result in limb loss or death. Full disclosure: I may be overly strident about this warning because I have a minor, but permanent, disfigurement on my hand, and lingering pain in my thumb, due to unrecognized exposure to HF about 30 years ago.

The Stanton Fireclay farmhouse sink 30" from Signature Hardware has that frame around it and it sells for $599. It is on this page of sinks, good hunting! Here is a link that might be useful: Stanton Fireclay Framed Firehouse sink 30

As far as I can tell, the nig bummer is that its meant to be a partial overmount with a flatish lip that goes over the counter. Unless you caulk well while installing, its moldville under that lip. I like that it's easy to clean and it always looks white. We got a third party grid that helps to keep pot marks away. The LACK of depth is a relief, I like the sink around 8 inches deep. If she uses 1/2 sheet pans frequently, she needs a different sink as this one will not fit those size things. I have a two burner pancake griddle - the cheap non-stick, for home use kind - and it won't fit that. It can sit on the top, and the front and back handles will rest on the sides - so I can still clean the pan. It will fit a regular roasting pan. The other two things that I don't like about the sink is the faucet is very far back (23" or so) in comparison to 19-21" for most undermounts. It acts funny if its filled with ice - just like a glass of iced tea, it will form condensate on the underside of the sink. I imagine that varies with where you live. I will get you a trash pullout picture soon.

If you look at the apron sinks on the Kohler website, they will tell you minimal sink size in the specs. You can get a Kohler cast iron Whitehaven (29 11/16") to fit in a 30" sink base. Kohler stainless steel Vault 29 1/2" also fits in a 30" sink base. https://www.us.kohler.com/us/browse/kitchen-kitchen-sinks/_/N-25b4Z1z13vf8