Well, I messed up a spot on my TV build. I was adding motor oil to the lawn mower and not thinking about a little drip on the edge of the bottle I set it on the bow of my TV. I have not fiber glassed it yet. So now I have a spot on non-critical part of the boat where motor oil seeped in and is now the size of about a silver dollar. So will I have to cut this contamination out and splice in a non-contaminated piece of wood or would I do ok to sand and rub some kind of chemical on it and then glass over it?