We have been using onward teak system which is a 3 part system and the results are excellent after cleaning and brightning we have had coments that the teak on the boat we have just cleaned is better than the brand new boat next to it.there is also a teak sealer that you can put on after that waterproofs the teak and when you need to clean it again the cleaner removes the sealer.YOU MUST KEEP EVERYTHING WET UNTILL TH BRIGHTNER HAS BEEN RINSED OFF