I know the link I supplied stipulates that the graphite comes off and gets on your clothing but for some reason mine doesn't do this. My boat has been sitting out in the elements for five months and it still looks new. Once in a while I would walk by and rub my hands along the hull bottom and all I would get on my hands was dust and pollen, no black graphite powder. Also, I used this mixture for the fill coats so it probably didn't add as much weight as applying it after the fact.

Glen in Baie-St-Paul.