A sink should be utilitarian, specially if it is used by renters or lots of guests. A sink that needs to be "bubble wrapped" or "idiot proofed" for daily use isn't very practical. If you are going to rent it out, then you need to accept that it will be used and possibly scratched and damaged.

Search on ”double kitchen sink mat” & quite a few options pop up. All pretty inexpensive & without suction cups. The search listed several with a matching sink divider mat too. Just look for a close fit with sink measurements & drain hole match. The silicon mats should be safe for a reglazed sink. Those marks from pots & pans can be scrubbed out - don’t use abrasive scrubbers or powder. Cerama Bryte for glass cooktops might work. I agree with chispa that if your place is rented or used by others, damage to everything is a hazard. However, most people don’t intentionally damage things & having the protective materials in place certainly will go a long way towards mitigating any damage. Nice job on your kitchen update from your before / after photo.

Do you happen to know what was used on your sink and backsplash? The note says multispec for the countertop, but does not say for the sink and backsplash.

@beesneeds Will have to wait for Nai to reply but I think all the surfaces were glazed over. The backsplash & sink are white & the countertop is “multispec” - maybe there’s speckles in the black that I can’t see in pic. If you zoom in on photo you can see the tile lines are still there - that’s why I think the original surfaces have been recoated. There are companies that do this work - the resurfacing.

Your sink is doomed, no matter what you do short of not using it. Reglazing is fine for tubs and showers, but the reglazers never seem to remove the disposal and drain flanges. This makes a perfect spot for the dissimilar movement created by hot water between the glaze and the underlying sink to begin peeling.

Sink replacement is your only cost effective option. Unfortunately, that probably means another top replacement for you as that may be more cost effective than a custom made sink.

A stainless steel basin rack may prevent some marks, but won't postpone the inevitable.

KC- multispec is the name of a resurfacing/glazing product, it comes in a bunch of colors. I was curious because it said multispec but not the color (black) for the counters, and a color (white) for the backsplash and sink but not the product used. I wonder if the company also used multispec in white for the backsplash and sink, or a different product.

@beesneeds yes @KW PNW Z8 is correct the sink and backsplash were recoated in white while the countertop is black with specs

beesneeds good observation! The spec is only on the black. No specs in the white just a solid white. I believe the same product was used as countertops with exception to color.

SORRY GUYS, the sink is RAW IRON STEEL and it was coated with whatever they used to coat it with back in the 40’s and 50’s I had it reglazed with whatever is written on that receipt!

Cast iron family

No, I'm not asking if there are specks or if the color is solid. I'm asking if the product they used on the counter was Multispec. This stuff:

In the note it's written as multispec on the counters. But it did not say what product was used for the sink and backsplash.

This is a futile effort. Replace the sink. Refinishing a sink is a waste of money and effort. It will always peel and chip.

"Refinishing a sink is a waste of money and effort."

Refinishing a sink with an applied coating is a waste of money and effort. Stainless steel and Corian sinks can be easily refinished to new by a DIYer with nothing but abrasives and a cheap random orbital sander.

"Is there a product whose shape would allow me to cover the entire sink including the raised middle section?"

If you search for Sink Saddle you will find options for the raised middle section.