And once you clean it, a coat of paint will dress it right back up again. Any of the single part "plastic" paints from Home Depot or Home Hardware etc will do a decent job in inside the boat. Ideally use Interlux Brightsides, but the hardware store paint is less expensive.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)