I just got a nice big commercial stainless steel sink for our kitchen.
I love it,
except it is loud and "tinny" when you drop stuff in it. I am
thinking of pulling it out, and painting the entire underside with that

thick.. black coating that is available for coating the back of pickup
trucks. It is thick, and I think it would help deaden the sound.
It is also made to stick to the truck in all weather conditions, so I
imagine it will stick to the sink even though expansion and
contraction/hot cold.

The coated side will be inside the cabinet, and never seen, so how it
looks is not an issue. Because of sink placement, other traditional
insulation is not really an option, so I need something that you
"paint" on, and sticks to the metal.

Is there anything else I should be considering using?