Cooktop scratches
Joe I still stand by cutting out 3 pieces, shape of your choice, from a regular silicone baking mat, not a fibreglass reinforced Silpat, and arranging in a tripod pattern over each burner hob. I don’t make blackened Cajun fish in my cast iron fry pans but I do use them for normal cooking and the worst that happens is the blue silicone slowly darkens and eventually I cut out some new ones from my original mat, been doing this for nine years, plenty of mat remaining, no melted silicone even when I used a cast iron induction interface disc a couple of times. Spilled errant salt crystals can scratch, maybe sugar as well. Give the silicone a try.