Originally Posted by apagano
I have been shopping around for a trawler and came upon this Grand Banks and can not for the life of me can figure out what the black stuff is on the decks9 please see attachments ), I asked the broker and he was as uninformed as I. Can anyone help with this and, can it be cleaned? Its strange as the rest of the deck is very clean and pretty.
That looks to me like he used a 2 part chemical Teak cleaner that if not done correctly will end up like that. the first part is a vicious chemical that turns the teak black and opened the grain and you scrub with a brush but is very time sensitive 1 minuet I believe and then part 2 neutralizes the chemical action and turns the teak back to a natural state for finishing. You have to do small areas at a time. https://www.marineoutfitters.ca/inde...e=767990207108
This is a newer version but older versions were very hard to use