if its not the only or worst spot on your boat i think id have to agree with cypher.
joel: excellant video find!!
if you follow those videos its actually pretty easy. being its a small area id go with useing a small brush over useing a disposable sprayer. just to make clean up a bit easier. its a Bish to sand because it builds up on the sand paper. when i did mine i used to wax paper to cover it from the atmosphere and it worked great.
if you do attemt it, do make the scrape a little bigger like thaey did in the video to make the edges beveled. and i found that wet sanding works best if at all possible. just wanted to add that...