Like dirty said, is the battery nearby? If so mix some baking soda n water and brush it on. If it bubbles you know exactly what it is.
Originally Posted by Kyle
Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.
wipe it down with A rag with some acetone on it and it should go away then just keep an eye on it for a week or so and see if it comes back or gets worse. looks kinda like some batery acid maybe got on it but i dont think you have anything to worry about