Well you can’t really get the full effect here but this sink had been caulked a long long time ago, and while the sink itself was in great shape, the edge/corner caulking was in serious need of some love and attention.
So I went at it tooth and nail, below you get a better sense of what was in there, it may have been silicone but felt more like latex, it was all mealy and discolored:
It took me over an hour working in tight angles/spaces to get it all cleaned up:And finally, with a bead of Silicone II, it looks truly fabulous: